625239699841 has 27 divisors (see below), whose sum is σ = 670422943323. Its totient is φ = 582982778880.

The previous prime is 625239699829. The next prime is 625239699883. The reversal of 625239699841 is 148996932526.

The square root of 625239699841 is 790721.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 141881042241 + 483358657600 = 376671^2 + 695240^2 .

It is not a de Polignac number, because 625239699841 - 2¹⁷ = 625239568769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625239699041) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2594355481 + ... + 2594355721.

Almost surely, 2^625239699841 is an apocalyptic number.

625239699841 is the 790721-st square number.

625239699841 is the 395361-st centered octagonal number.

It is an amenable number.

625239699841 is a deficient number, since it is larger than the sum of its proper divisors (45183243482).

625239699841 is an frugal number, since it uses more digits than its factorization.

625239699841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 451 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 64.

Multiplying 625239699841 by its sum of digits (64), we get a square (40015340789824 = 6325768²).

The spelling of 625239699841 in words is "six hundred twenty-five billion, two hundred thirty-nine million, six hundred ninety-nine thousand, eight hundred forty-one".