625044734738 has 18 divisors (see below), whose sum is σ = 989543509479. Its totient is φ = 296063759052.

The previous prime is 625044734723. The next prime is 625044734747. The reversal of 625044734738 is 837437440526.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 312522367369 + 312522367369 = 559037^2 + 559037^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=559037.

It is a self number, because there is not a number n which added to its sum of digits gives 625044734738.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21228695 + ... + 21258117.

Almost surely, 2^625044734738 is an apocalyptic number.

625044734738 is a deficient number, since it is larger than the sum of its proper divisors (364498774741).

625044734738 is an frugal number, since it uses more digits than its factorization.

625044734738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58886 (or 29444 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 53.

The spelling of 625044734738 in words is "six hundred twenty-five billion, forty-four million, seven hundred thirty-four thousand, seven hundred thirty-eight".