72531292068 has 36 divisors (see below), whose sum is σ = 183515562048. Its totient is φ = 24154340400.

The previous prime is 72531292061. The next prime is 72531292103. The reversal of 72531292068 is 86029213527.

72531292068 is a `hidden beast` number, since 72 + 531 + 29 + 20 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (72531292061) 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 11 ways as a sum of consecutive naturals, for example, 909408 + ... + 985943.

Almost surely, 2^72531292068 is an apocalyptic number.

It is an amenable number.

72531292068 is an abundant number, since it is smaller than the sum of its proper divisors (110984269980).

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

72531292068 is a wasteful number, since it uses less digits than its factorization.

72531292068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896424 (or 1896419 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 72531292068 in words is "seventy-two billion, five hundred thirty-one million, two hundred ninety-two thousand, sixty-eight".