980976878865 has 80 divisors (see below), whose sum is σ = 1777211566416. Its totient is φ = 517625856000.

The previous prime is 980976878831. The next prime is 980976878887. The reversal of 980976878865 is 568878679089.

It can be written as a sum of positive squares in 8 ways, for example, as 238642997121 + 742333881744 = 488511^2 + 861588^2 .

It is not a de Polignac number, because 980976878865 - 2⁹ = 980976878353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 60572209 + ... + 60588401.

Almost surely, 2^980976878865 is an apocalyptic number.

It is an amenable number.

980976878865 is a deficient number, since it is larger than the sum of its proper divisors (796234687551).

980976878865 is a wasteful number, since it uses less digits than its factorization.

980976878865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17792 (or 17783 counting only the distinct ones).

The product of its (nonzero) digits is 2926264320, while the sum is 81.

The spelling of 980976878865 in words is "nine hundred eighty billion, nine hundred seventy-six million, eight hundred seventy-eight thousand, eight hundred sixty-five".