73854412511881 has 9 divisors (see below), whose sum is σ = 74044332905799. Its totient is φ = 73664978077944.

The previous prime is 73854412511861. The next prime is 73854412511923. The reversal of 73854412511881 is 18811521445837.

The square root of 73854412511881 is 8593859.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 49495094325625 + 24359318186256 = 7035275^2 + 4935516^2 .

It is not a de Polignac number, because 73854412511881 - 2²⁹ = 73853875640969 is a prime.

It is a super-2 number, since 2×73854412511881² (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 (73854412511861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3411751200 + ... + 3411772846.

Almost surely, 2^{73854412511881} is an apocalyptic number.

73854412511881 is the 8593859-th square number.

73854412511881 is the 4296930-th centered octagonal number.

It is an amenable number.

73854412511881 is a deficient number, since it is larger than the sum of its proper divisors (189920393918).

73854412511881 is an frugal number, since it uses more digits than its factorization.

73854412511881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44088 (or 22044 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 58.

The spelling of 73854412511881 in words is "seventy-three trillion, eight hundred fifty-four billion, four hundred twelve million, five hundred eleven thousand, eight hundred eighty-one".