625545545525 has 12 divisors (see below), whose sum is σ = 776864362692. Its totient is φ = 499670058240.

The previous prime is 625545545519. The next prime is 625545545533. The reversal of 625545545525 is 525545545526.

625545545525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 1102638436 + 624442907089 = 33206^2 + 790217^2 .

It is not a de Polignac number, because 625545545525 - 2²² = 625541351221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19142804 + ... + 19175453.

It is an arithmetic number, because the mean of its divisors is an integer number (64738696891).

Almost surely, 2^625545545525 is an apocalyptic number.

It is an amenable number.

625545545525 is a deficient number, since it is larger than the sum of its proper divisors (151318817167).

625545545525 is a wasteful number, since it uses less digits than its factorization.

625545545525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38318920 (or 38318915 counting only the distinct ones).

The product of its digits is 30000000, while the sum is 53.

Subtracting from 625545545525 its reverse (525545545526), we obtain a palindrome (99999999999).

The spelling of 625545545525 in words is "six hundred twenty-five billion, five hundred forty-five million, five hundred forty-five thousand, five hundred twenty-five".