72354325681 has 16 divisors (see below), whose sum is σ = 82451063808. Its totient is φ = 62850158800.

The previous prime is 72354325661. The next prime is 72354325709. The reversal of 72354325681 is 18652345327.

It is not a de Polignac number, because 72354325681 - 2¹³ = 72354317489 is a prime.

It is a super-2 number, since 2×72354325681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72354325601) 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, 88596 + ... + 390586.

It is an arithmetic number, because the mean of its divisors is an integer number (5153191488).

Almost surely, 2^72354325681 is an apocalyptic number.

It is an amenable number.

72354325681 is a deficient number, since it is larger than the sum of its proper divisors (10096738127).

72354325681 is a wasteful number, since it uses less digits than its factorization.

72354325681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302972.

The product of its digits is 1209600, while the sum is 46.

The spelling of 72354325681 in words is "seventy-two billion, three hundred fifty-four million, three hundred twenty-five thousand, six hundred eighty-one".