977149656 has 96 divisors (see below), whose sum is σ = 3136573440. Its totient is φ = 279181728.

The previous prime is 977149643. The next prime is 977149703. The reversal of 977149656 is 656941779.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22296 + ... + 49511.

It is an arithmetic number, because the mean of its divisors is an integer number (32672640).

Almost surely, 2^977149656 is an apocalyptic number.

It is an amenable number.

977149656 is an abundant number, since it is smaller than the sum of its proper divisors (2159423784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

977149656 is a wasteful number, since it uses less digits than its factorization.

977149656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71835 (or 71819 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 977149656 is about 31259.3930843195. The cubic root of 977149656 is about 992.3244554143.

The spelling of 977149656 in words is "nine hundred seventy-seven million, one hundred forty-nine thousand, six hundred fifty-six".