72416200021640 has 16 divisors (see below), whose sum is σ = 162936450048780. Its totient is φ = 28966480008640.

The previous prime is 72416200021639. The next prime is 72416200021657. The reversal of 72416200021640 is 4612000261427.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59187572675716 + 13228627345924 = 7693346^2 + 3637118^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72416200021640.

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, 905202500231 + ... + 905202500310.

Almost surely, 2^{72416200021640} is an apocalyptic number.

It is an amenable number.

72416200021640 is an abundant number, since it is smaller than the sum of its proper divisors (90520250027140).

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

72416200021640 is a wasteful number, since it uses less digits than its factorization.

72416200021640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810405000552 (or 1810405000548 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 72416200021640 in words is "seventy-two trillion, four hundred sixteen billion, two hundred million, twenty-one thousand, six hundred forty".