7759071531121 has 3 divisors (see below), whose sum is σ = 7759074316633. Its totient is φ = 7759068745610.

The previous prime is 7759071531109. The next prime is 7759071531139. The reversal of 7759071531121 is 1211351709577.

The square root of 7759071531121 is 2785511.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-7759071531121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7759071537121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1392756 + ... + 4178266.

Almost surely, 2^{7759071531121} is an apocalyptic number.

7759071531121 is the 2785511-st square number.

7759071531121 is the 1392756-th centered octagonal number.

It is an amenable number.

7759071531121 is a deficient number, since it is larger than the sum of its proper divisors (2785512).

7759071531121 is an frugal number, since it uses more digits than its factorization.

7759071531121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571022 (or 2785511 counting only the distinct ones).

The product of its (nonzero) digits is 463050, while the sum is 49.

Multiplying 7759071531121 by its sum of digits (49), we get a square (380194505024929 = 19498577²).

The spelling of 7759071531121 in words is "seven trillion, seven hundred fifty-nine billion, seventy-one million, five hundred thirty-one thousand, one hundred twenty-one".