72400556870 has 8 divisors (see below), whose sum is σ = 130321002384. Its totient is φ = 28960222744.

The previous prime is 72400556861. The next prime is 72400556903. The reversal of 72400556870 is 7865500427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×72400556870² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3620027834 + ... + 3620027853.

It is an arithmetic number, because the mean of its divisors is an integer number (16290125298).

Almost surely, 2^72400556870 is an apocalyptic number.

72400556870 is a deficient number, since it is larger than the sum of its proper divisors (57920445514).

72400556870 is a wasteful number, since it uses less digits than its factorization.

72400556870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7240055694.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 72400556870 in words is "seventy-two billion, four hundred million, five hundred fifty-six thousand, eight hundred seventy".