86647578137 has 4 divisors (see below), whose sum is σ = 91744494516. Its totient is φ = 81550661760.

The previous prime is 86647578107. The next prime is 86647578163. The reversal of 86647578137 is 73187574668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55592679961 + 31054898176 = 235781^2 + 176224^2 .

It is a cyclic number.

It is not a de Polignac number, because 86647578137 - 2¹⁰ = 86647577113 is a prime.

It is a super-3 number, since 3×86647578137³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86647578137.

It is not an unprimeable number, because it can be changed into a prime (86647578107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2548458164 + ... + 2548458197.

It is an arithmetic number, because the mean of its divisors is an integer number (22936123629).

Almost surely, 2^86647578137 is an apocalyptic number.

It is an amenable number.

86647578137 is a deficient number, since it is larger than the sum of its proper divisors (5096916379).

86647578137 is a wasteful number, since it uses less digits than its factorization.

86647578137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096916378.

The product of its digits is 47416320, while the sum is 62.

The spelling of 86647578137 in words is "eighty-six billion, six hundred forty-seven million, five hundred seventy-eight thousand, one hundred thirty-seven".