87965578971 has 12 divisors (see below), whose sum is σ = 127070643960. Its totient is φ = 58639449120.

The previous prime is 87965578933. The next prime is 87965578979. The reversal of 87965578971 is 17987556978.

It is a de Polignac number, because none of the positive numbers 2^k-87965578971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87965578971.

It is not an unprimeable number, because it can be changed into a prime (87965578979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222765 + ... + 474926.

It is an arithmetic number, because the mean of its divisors is an integer number (10589220330).

Almost surely, 2^87965578971 is an apocalyptic number.

87965578971 is a deficient number, since it is larger than the sum of its proper divisors (39105064989).

87965578971 is a wasteful number, since it uses less digits than its factorization.

87965578971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711706 (or 711703 counting only the distinct ones).

The product of its digits is 266716800, while the sum is 72.

The spelling of 87965578971 in words is "eighty-seven billion, nine hundred sixty-five million, five hundred seventy-eight thousand, nine hundred seventy-one".