977651616 has 48 divisors (see below), whose sum is σ = 2677921344. Its totient is φ = 311714304.

The previous prime is 977651603. The next prime is 977651627. The reversal of 977651616 is 616156779.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×977651616² = 1911605364534822912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219181 + ... + 223596.

It is an arithmetic number, because the mean of its divisors is an integer number (55790028).

Almost surely, 2^977651616 is an apocalyptic number.

977651616 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

977651616 is an abundant number, since it is smaller than the sum of its proper divisors (1700269728).

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

977651616 is a wasteful number, since it uses less digits than its factorization.

977651616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442813 (or 442805 counting only the distinct ones).

The product of its digits is 476280, while the sum is 48.

The square root of 977651616 is about 31267.4210001401. The cubic root of 977651616 is about 992.4943447493.

The spelling of 977651616 in words is "nine hundred seventy-seven million, six hundred fifty-one thousand, six hundred sixteen".