86827617557 has 4 divisors (see below), whose sum is σ = 86970662016. Its totient is φ = 86684573100.

The previous prime is 86827617551. The next prime is 86827617563. The reversal of 86827617557 is 75571672868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (86827617551) and next prime (86827617563).

It is a cyclic number.

It is not a de Polignac number, because 86827617557 - 2⁶ = 86827617493 is a prime.

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 86827617557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86827617551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71521319 + ... + 71522532.

It is an arithmetic number, because the mean of its divisors is an integer number (21742665504).

Almost surely, 2^86827617557 is an apocalyptic number.

It is an amenable number.

86827617557 is a deficient number, since it is larger than the sum of its proper divisors (143044459).

86827617557 is a wasteful number, since it uses less digits than its factorization.

86827617557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143044458.

The product of its digits is 39513600, while the sum is 62.

The spelling of 86827617557 in words is "eighty-six billion, eight hundred twenty-seven million, six hundred seventeen thousand, five hundred fifty-seven".