72453770172 has 72 divisors (see below), whose sum is σ = 216528530400. Its totient is φ = 19987244928.

The previous prime is 72453770141. The next prime is 72453770197. The reversal of 72453770172 is 27107735427.

72453770172 is a `hidden beast` number, since 72 + 45 + 377 + 0 + 172 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4949847 + ... + 4964462.

It is an arithmetic number, because the mean of its divisors is an integer number (3007340700).

Almost surely, 2^72453770172 is an apocalyptic number.

It is an amenable number.

72453770172 is an abundant number, since it is smaller than the sum of its proper divisors (144074760228).

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

72453770172 is a wasteful number, since it uses less digits than its factorization.

72453770172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9914355 (or 9914350 counting only the distinct ones).

The product of its (nonzero) digits is 576240, while the sum is 45.

The spelling of 72453770172 in words is "seventy-two billion, four hundred fifty-three million, seven hundred seventy thousand, one hundred seventy-two".