252787518722 has 6 divisors (see below), whose sum is σ = 379182344643. Its totient is φ = 126393403842.

The previous prime is 252787518713. The next prime is 252787518749. The reversal of 252787518722 is 227815787252.

It can be written as a sum of positive squares in only one way, i.e., 126393759361 + 126393759361 = 355519^2 + 355519^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=355519.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 533279 + ... + 888797.

Almost surely, 2^252787518722 is an apocalyptic number.

252787518722 is a deficient number, since it is larger than the sum of its proper divisors (126394825921).

252787518722 is an frugal number, since it uses more digits than its factorization.

252787518722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711040 (or 355521 counting only the distinct ones).

The product of its digits is 8780800, while the sum is 56.

The spelling of 252787518722 in words is "two hundred fifty-two billion, seven hundred eighty-seven million, five hundred eighteen thousand, seven hundred twenty-two".