72523001920 has 56 divisors (see below), whose sum is σ = 176711603904. Its totient is φ = 28334562816.

The previous prime is 72523001909. The next prime is 72523001939. The reversal of 72523001920 is 2910032527.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2621524 + ... + 2649043.

Almost surely, 2^72523001920 is an apocalyptic number.

It is an amenable number.

72523001920 is an abundant number, since it is smaller than the sum of its proper divisors (104188601984).

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

72523001920 is a wasteful number, since it uses less digits than its factorization.

72523001920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270627 (or 5270617 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 72523001920 in words is "seventy-two billion, five hundred twenty-three million, one thousand, nine hundred twenty".