87320608816731 has 16 divisors (see below), whose sum is σ = 123004819468800. Its totient is φ = 55010488701728.

The previous prime is 87320608816621. The next prime is 87320608816733. The reversal of 87320608816731 is 13761880602378.

It is a happy number.

It is not a de Polignac number, because 87320608816731 - 2²⁵ = 87320575262299 is a prime.

It is a super-2 number, since 2×87320608816731² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87320608816733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10677497601 + ... + 10677505778.

It is an arithmetic number, because the mean of its divisors is an integer number (7687801216800).

Almost surely, 2^{87320608816731} is an apocalyptic number.

87320608816731 is a deficient number, since it is larger than the sum of its proper divisors (35684210652069).

87320608816731 is a wasteful number, since it uses less digits than its factorization.

87320608816731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21355003458.

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 87320608816731 in words is "eighty-seven trillion, three hundred twenty billion, six hundred eight million, eight hundred sixteen thousand, seven hundred thirty-one".