86621137563657 has 16 divisors (see below), whose sum is σ = 115571011792320. Its totient is φ = 57709352143872.

The previous prime is 86621137563637. The next prime is 86621137563691. The reversal of 86621137563657 is 75636573112668.

It is not a de Polignac number, because 86621137563657 - 2¹⁸ = 86621137301513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86621137563637) 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 15 ways as a sum of consecutive naturals, for example, 42776653 + ... + 44755829.

It is an arithmetic number, because the mean of its divisors is an integer number (7223188237020).

Almost surely, 2^{86621137563657} is an apocalyptic number.

It is an amenable number.

86621137563657 is a deficient number, since it is larger than the sum of its proper divisors (28949874228663).

86621137563657 is a wasteful number, since it uses less digits than its factorization.

86621137563657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988792.

The product of its digits is 228614400, while the sum is 66.

The spelling of 86621137563657 in words is "eighty-six trillion, six hundred twenty-one billion, one hundred thirty-seven million, five hundred sixty-three thousand, six hundred fifty-seven".