99520312721761 has 16 divisors (see below), whose sum is σ = 99909659824128. Its totient is φ = 99131867121600.

The previous prime is 99520312721743. The next prime is 99520312721773. The reversal of 99520312721761 is 16712721302599.

It is a cyclic number.

It is not a de Polignac number, because 99520312721761 - 2⁵ = 99520312721729 is a prime.

It is a super-2 number, since 2×99520312721761² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99520312721561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616782051 + ... + 616943383.

It is an arithmetic number, because the mean of its divisors is an integer number (6244353739008).

Almost surely, 2^{99520312721761} is an apocalyptic number.

It is an amenable number.

99520312721761 is a deficient number, since it is larger than the sum of its proper divisors (389347102367).

99520312721761 is a wasteful number, since it uses less digits than its factorization.

99520312721761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164112.

The product of its (nonzero) digits is 2857680, while the sum is 55.

The spelling of 99520312721761 in words is "ninety-nine trillion, five hundred twenty billion, three hundred twelve million, seven hundred twenty-one thousand, seven hundred sixty-one".