72400585551 has 16 divisors (see below), whose sum is σ = 110330965248. Its totient is φ = 41369414400.

The previous prime is 72400585531. The next prime is 72400585553. The reversal of 72400585551 is 15558500427.

It is not a de Polignac number, because 72400585551 - 2⁵ = 72400585519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72400585553) 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 15 ways as a sum of consecutive naturals, for example, 322911 + ... + 499071.

It is an arithmetic number, because the mean of its divisors is an integer number (6895685328).

Almost surely, 2^72400585551 is an apocalyptic number.

72400585551 is a deficient number, since it is larger than the sum of its proper divisors (37930379697).

72400585551 is a wasteful number, since it uses less digits than its factorization.

72400585551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195742.

The product of its (nonzero) digits is 280000, while the sum is 42.

The spelling of 72400585551 in words is "seventy-two billion, four hundred million, five hundred eighty-five thousand, five hundred fifty-one".