977992434225 has 27 divisors (see below), whose sum is σ = 1751719685313. Its totient is φ = 521588053440.

The previous prime is 977992434203. The next prime is 977992434229. The reversal of 977992434225 is 522434299779.

The square root of 977992434225 is 988935.

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

977992434225 is a `hidden beast` number, since 97 + 7 + 9 + 92 + 434 + 2 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 102143520801 + 875848913424 = 319599^2 + 935868^2 .

It is not a de Polignac number, because 977992434225 - 2²⁷ = 977858216497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (977992434229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14801061 + ... + 14866989.

Almost surely, 2^977992434225 is an apocalyptic number.

977992434225 is the 988935-th square number.

977992434225 is the 494468-th centered octagonal number.

It is an amenable number.

977992434225 is a deficient number, since it is larger than the sum of its proper divisors (773727251088).

977992434225 is an frugal number, since it uses more digits than its factorization.

977992434225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131874 (or 65937 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The spelling of 977992434225 in words is "nine hundred seventy-seven billion, nine hundred ninety-two million, four hundred thirty-four thousand, two hundred twenty-five".