625002261309 has 6 divisors (see below), whose sum is σ = 902781044126. Its totient is φ = 416668174200.

The previous prime is 625002261293. The next prime is 625002261347. The reversal of 625002261309 is 903162200526.

625002261309 is a `hidden beast` number, since 62 + 500 + 2 + 2 + 61 + 30 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 520783052409 + 104219208900 = 721653^2 + 322830^2 .

It is not a de Polignac number, because 625002261309 - 2⁴ = 625002261293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625002261209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34722347842 + ... + 34722347859.

Almost surely, 2^625002261309 is an apocalyptic number.

It is an amenable number.

625002261309 is a deficient number, since it is larger than the sum of its proper divisors (277778782817).

625002261309 is a wasteful number, since it uses less digits than its factorization.

625002261309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69444695707 (or 69444695704 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 625002261309 in words is "six hundred twenty-five billion, two million, two hundred sixty-one thousand, three hundred nine".