86951571975 has 72 divisors (see below), whose sum is σ = 165023664000. Its totient is φ = 43642152000.

The previous prime is 86951571961. The next prime is 86951571977. The reversal of 86951571975 is 57917515968.

86951571975 is a `hidden beast` number, since 8 + 6 + 9 + 51 + 571 + 9 + 7 + 5 = 666.

It is not a de Polignac number, because 86951571975 - 2¹⁷ = 86951440903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86951571977) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 578176 + ... + 712874.

Almost surely, 2^86951571975 is an apocalyptic number.

86951571975 is a deficient number, since it is larger than the sum of its proper divisors (78072092025).

86951571975 is a wasteful number, since it uses less digits than its factorization.

86951571975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134885 (or 134877 counting only the distinct ones).

The product of its digits is 23814000, while the sum is 63.

The spelling of 86951571975 in words is "eighty-six billion, nine hundred fifty-one million, five hundred seventy-one thousand, nine hundred seventy-five".