977867556 has 24 divisors (see below), whose sum is σ = 2291661120. Its totient is φ = 324531552.

The previous prime is 977867551. The next prime is 977867567. The reversal of 977867556 is 655768779.

It is a self number, because there is not a number n which added to its sum of digits gives 977867556.

It is not an unprimeable number, because it can be changed into a prime (977867551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175176 + ... + 180671.

It is an arithmetic number, because the mean of its divisors is an integer number (95485880).

Almost surely, 2^977867556 is an apocalyptic number.

It is an amenable number.

977867556 is an abundant number, since it is smaller than the sum of its proper divisors (1313793564).

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

977867556 is a wasteful number, since it uses less digits than its factorization.

977867556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356083 (or 356081 counting only the distinct ones).

The product of its digits is 22226400, while the sum is 60.

The square root of 977867556 is about 31270.8739244684. The cubic root of 977867556 is about 992.5674121719.

The spelling of 977867556 in words is "nine hundred seventy-seven million, eight hundred sixty-seven thousand, five hundred fifty-six".