86964865657 has 6 divisors (see below), whose sum is σ = 89860679034. Its totient is φ = 84159546480.

The previous prime is 86964865649. The next prime is 86964865681. The reversal of 86964865657 is 75656846968.

It can be written as a sum of positive squares in only one way, i.e., 56623057936 + 30341807721 = 237956^2 + 174189^2 .

It is not a de Polignac number, because 86964865657 - 2³ = 86964865649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86964860657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45246108 + ... + 45248029.

It is an arithmetic number, because the mean of its divisors is an integer number (14976779839).

Almost surely, 2^86964865657 is an apocalyptic number.

It is an amenable number.

86964865657 is a deficient number, since it is larger than the sum of its proper divisors (2895813377).

86964865657 is an equidigital number, since it uses as much as digits as its factorization.

86964865657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90494199 (or 90494168 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 70.

The spelling of 86964865657 in words is "eighty-six billion, nine hundred sixty-four million, eight hundred sixty-five thousand, six hundred fifty-seven".