72400743218 has 16 divisors (see below), whose sum is σ = 109763479320. Its totient is φ = 35813923200.

The previous prime is 72400743197. The next prime is 72400743251. The reversal of 72400743218 is 81234700427.

It can be written as a sum of positive squares in 4 ways, for example, as 62648588209 + 9752155009 = 250297^2 + 98753^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107123 + ... + 395318.

Almost surely, 2^72400743218 is an apocalyptic number.

72400743218 is a deficient number, since it is larger than the sum of its proper divisors (37362736102).

72400743218 is a wasteful number, since it uses less digits than its factorization.

72400743218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503213.

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 72400743218 in words is "seventy-two billion, four hundred million, seven hundred forty-three thousand, two hundred eighteen".