72407206157640 has 64 divisors (see below), whose sum is σ = 217239371193600. Its totient is φ = 19307010289152.

The previous prime is 72407206157633. The next prime is 72407206157723. The reversal of 72407206157640 is 4675160270427.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23181757 + ... + 26119116.

It is an arithmetic number, because the mean of its divisors is an integer number (3394365174900).

Almost surely, 2^{72407206157640} is an apocalyptic number.

It is an amenable number.

72407206157640 is an abundant number, since it is smaller than the sum of its proper divisors (144832165035960).

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

72407206157640 is a wasteful number, since it uses less digits than its factorization.

72407206157640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49313126 (or 49313122 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 51.

The spelling of 72407206157640 in words is "seventy-two trillion, four hundred seven billion, two hundred six million, one hundred fifty-seven thousand, six hundred forty".