769888669489 has 9 divisors (see below), whose sum is σ = 771570864129. Its totient is φ = 768210140160.

The previous prime is 769888669457. The next prime is 769888669493. The reversal of 769888669489 is 984966888967.

The square root of 769888669489 is 877433.

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

It can be written as a sum of positive squares in 4 ways, for example, as 130541303025 + 639347366464 = 361305^2 + 799592^2 .

It is not a de Polignac number, because 769888669489 - 2⁵ = 769888669457 is a prime.

It is a super-2 number, since 2×769888669489² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (769888669409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 667725937 + ... + 667727089.

Almost surely, 2^769888669489 is an apocalyptic number.

769888669489 is the 877433-rd square number.

769888669489 is the 438717-th centered octagonal number.

It is an amenable number.

769888669489 is a deficient number, since it is larger than the sum of its proper divisors (1682194640).

769888669489 is an frugal number, since it uses more digits than its factorization.

769888669489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828 (or 1914 counting only the distinct ones).

The product of its digits is 18059231232, while the sum is 88.

The spelling of 769888669489 in words is "seven hundred sixty-nine billion, eight hundred eighty-eight million, six hundred sixty-nine thousand, four hundred eighty-nine".