625001388820 has 12 divisors (see below), whose sum is σ = 1312502916564. Its totient is φ = 250000555520.

The previous prime is 625001388793. The next prime is 625001388829. The reversal of 625001388820 is 28883100526.

It can be written as a sum of positive squares in 2 ways, for example, as 376036315524 + 248965073296 = 613218^2 + 498964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625001388829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15625034701 + ... + 15625034740.

It is an arithmetic number, because the mean of its divisors is an integer number (109375243047).

Almost surely, 2^625001388820 is an apocalyptic number.

It is an amenable number.

625001388820 is an abundant number, since it is smaller than the sum of its proper divisors (687501527744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625001388820 is a wasteful number, since it uses less digits than its factorization.

625001388820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31250069450 (or 31250069448 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 625001388820 in words is "six hundred twenty-five billion, one million, three hundred eighty-eight thousand, eight hundred twenty".