979527863521 has 9 divisors (see below), whose sum is σ = 987428119251. Its totient is φ = 971690342112.

The previous prime is 979527863519. The next prime is 979527863537. The reversal of 979527863521 is 125368725979.

The square root of 979527863521 is 989711.

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

It can be written as a sum of positive squares in only one way, i.e., 955046880225 + 24480983296 = 977265^2 + 156464^2 .

It is not a de Polignac number, because 979527863521 - 2¹ = 979527863519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979527863621) 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, 125689401 + ... + 125697193.

Almost surely, 2^979527863521 is an apocalyptic number.

979527863521 is the 989711-st square number.

979527863521 is the 494856-th centered octagonal number.

It is an amenable number.

979527863521 is a deficient number, since it is larger than the sum of its proper divisors (7900255730).

979527863521 is an frugal number, since it uses more digits than its factorization.

979527863521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15840 (or 7920 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 64.

Multiplying 979527863521 by its sum of digits (64), we get a square (62689783265344 = 7917688²).

The spelling of 979527863521 in words is "nine hundred seventy-nine billion, five hundred twenty-seven million, eight hundred sixty-three thousand, five hundred twenty-one".