72865785730 has 16 divisors (see below), whose sum is σ = 138873615480. Its totient is φ = 27431825152.

The previous prime is 72865785721. The next prime is 72865785761. The reversal of 72865785730 is 3758756827.

It can be written as a sum of positive squares in 4 ways, for example, as 71675604729 + 1190181001 = 267723^2 + 34499^2 .

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, 214310965 + ... + 214311304.

Almost surely, 2^72865785730 is an apocalyptic number.

72865785730 is a deficient number, since it is larger than the sum of its proper divisors (66007829750).

72865785730 is a wasteful number, since it uses less digits than its factorization.

72865785730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428622293.

The product of its (nonzero) digits is 19756800, while the sum is 58.

The spelling of 72865785730 in words is "seventy-two billion, eight hundred sixty-five million, seven hundred eighty-five thousand, seven hundred thirty".