755798980689 has 9 divisors (see below), whose sum is σ = 1091713406043. Its totient is φ = 503864248392.

The previous prime is 755798980669. The next prime is 755798980709. The reversal of 755798980689 is 986089897557.

The square root of 755798980689 is 869367.

It is a perfect power (a square), and thus also a powerful number.

755798980689 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (755798980669) and next prime (755798980709).

It can be written as a sum of positive squares in only one way, i.e., 539294890689 + 216504090000 = 734367^2 + 465300^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 755798980689 - 2⁷ = 755798980561 is a prime.

It is a super-4 number, since 4×755798980689⁴ (a number of 49 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (755798980669) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2463207 + ... + 2752995.

Almost surely, 2^755798980689 is an apocalyptic number.

755798980689 is the 869367-th square number.

755798980689 is the 434684-th centered octagonal number.

It is an amenable number.

755798980689 is a deficient number, since it is larger than the sum of its proper divisors (335914425354).

755798980689 is an frugal number, since it uses more digits than its factorization.

755798980689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579584 (or 289792 counting only the distinct ones).

The product of its (nonzero) digits is 2743372800, while the sum is 81.

Multiplying 755798980689 by its sum of digits (81), we get a square (61219717435809 = 7824303²).

The spelling of 755798980689 in words is "seven hundred fifty-five billion, seven hundred ninety-eight million, nine hundred eighty thousand, six hundred eighty-nine".