977639534668 has 48 divisors (see below), whose sum is σ = 1805668018560. Its totient is φ = 462440160000.

The previous prime is 977639534617. The next prime is 977639534723. The reversal of 977639534668 is 866435936779.

It is a super-4 number, since 4×977639534668⁴ (a number of 49 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 977639534668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4511278 + ... + 4723018.

It is an arithmetic number, because the mean of its divisors is an integer number (37618083720).

Almost surely, 2^977639534668 is an apocalyptic number.

It is an amenable number.

977639534668 is a deficient number, since it is larger than the sum of its proper divisors (828028483892).

977639534668 is a wasteful number, since it uses less digits than its factorization.

977639534668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212578 (or 212576 counting only the distinct ones).

The product of its digits is 1234517760, while the sum is 73.

The spelling of 977639534668 in words is "nine hundred seventy-seven billion, six hundred thirty-nine million, five hundred thirty-four thousand, six hundred sixty-eight".