72040817887400 has 48 divisors (see below), whose sum is σ = 169221653196540. Its totient is φ = 28519251609600.

The previous prime is 72040817887391. The next prime is 72040817887427. The reversal of 72040817887400 is 478871804027.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 24818550439684 + 47222267447716 = 4981822^2 + 6871846^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1856702711 + ... + 1856741510.

Almost surely, 2^{72040817887400} is an apocalyptic number.

It is an amenable number.

72040817887400 is an abundant number, since it is smaller than the sum of its proper divisors (97180835309140).

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

72040817887400 is a wasteful number, since it uses less digits than its factorization.

72040817887400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713444334 (or 3713444325 counting only the distinct ones).

The product of its (nonzero) digits is 5619712, while the sum is 56.

The spelling of 72040817887400 in words is "seventy-two trillion, forty billion, eight hundred seventeen million, eight hundred eighty-seven thousand, four hundred".