977615091871 has 16 divisors (see below), whose sum is σ = 1075705486848. Its totient is φ = 881078040000.

The previous prime is 977615091811. The next prime is 977615091881. The reversal of 977615091871 is 178190516779.

It is a cyclic number.

It is not a de Polignac number, because 977615091871 - 2⁷ = 977615091743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977615091811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699856 + ... + 1563658.

It is an arithmetic number, because the mean of its divisors is an integer number (67231592928).

Almost surely, 2^977615091871 is an apocalyptic number.

977615091871 is a deficient number, since it is larger than the sum of its proper divisors (98090394977).

977615091871 is a wasteful number, since it uses less digits than its factorization.

977615091871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864702.

The product of its (nonzero) digits is 6667920, while the sum is 61.

The spelling of 977615091871 in words is "nine hundred seventy-seven billion, six hundred fifteen million, ninety-one thousand, eight hundred seventy-one".