86615423257 has 16 divisors (see below), whose sum is σ = 99592130880. Its totient is φ = 74591608000.

The previous prime is 86615423197. The next prime is 86615423261. The reversal of 86615423257 is 75232451668.

It is a cyclic number.

It is not a de Polignac number, because 86615423257 - 2⁷ = 86615423129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86615423257.

It is not an unprimeable number, because it can be changed into a prime (86615423857) 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, 2544619 + ... + 2578432.

It is an arithmetic number, because the mean of its divisors is an integer number (6224508180).

Almost surely, 2^86615423257 is an apocalyptic number.

It is an amenable number.

86615423257 is a deficient number, since it is larger than the sum of its proper divisors (12976707623).

86615423257 is a wasteful number, since it uses less digits than its factorization.

86615423257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123144.

The product of its digits is 2419200, while the sum is 49.

The spelling of 86615423257 in words is "eighty-six billion, six hundred fifteen million, four hundred twenty-three thousand, two hundred fifty-seven".