977397185956 has 9 divisors (see below), whose sum is σ = 1710448535649. Its totient is φ = 488697604344.

The previous prime is 977397185927. The next prime is 977397185969. The reversal of 977397185956 is 659581793779.

The square root of 977397185956 is 988634.

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., 954470380900 + 22926805056 = 976970^2 + 151416^2 .

It is a super-2 number, since 2×977397185956² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1730110 + ... + 2224426.

Almost surely, 2^977397185956 is an apocalyptic number.

977397185956 is the 988634-th square number.

It is an amenable number.

977397185956 is a deficient number, since it is larger than the sum of its proper divisors (733051349693).

977397185956 is an frugal number, since it uses more digits than its factorization.

977397185956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988638 (or 494319 counting only the distinct ones).

The product of its digits is 900169200, while the sum is 76.

The spelling of 977397185956 in words is "nine hundred seventy-seven billion, three hundred ninety-seven million, one hundred eighty-five thousand, nine hundred fifty-six".