72291121140924 has 108 divisors (see below), whose sum is σ = 212655259702704. Its totient is φ = 20646352839168.

The previous prime is 72291121140913. The next prime is 72291121140947. The reversal of 72291121140924 is 42904112119227.

It is a happy number.

72291121140924 is a `hidden beast` number, since 7 + 2 + 2 + 9 + 1 + 1 + 211 + 409 + 24 = 666.

72291121140924 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×72291121140924³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72291121140924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3771157 + ... + 12601740.

Almost surely, 2^{72291121140924} is an apocalyptic number.

It is an amenable number.

72291121140924 is an abundant number, since it is smaller than the sum of its proper divisors (140364138561780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72291121140924 is a wasteful number, since it uses less digits than its factorization.

72291121140924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16375424 (or 16375412 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 72291121140924 in words is "seventy-two trillion, two hundred ninety-one billion, one hundred twenty-one million, one hundred forty thousand, nine hundred twenty-four".