25924428820 has 12 divisors (see below), whose sum is σ = 54441300564. Its totient is φ = 10369771520.

The previous prime is 25924428811. The next prime is 25924428853. The reversal of 25924428820 is 2882442952.

It can be written as a sum of positive squares in 2 ways, for example, as 6121184644 + 19803244176 = 78238^2 + 140724^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648110701 + ... + 648110740.

It is an arithmetic number, because the mean of its divisors is an integer number (4536775047).

Almost surely, 2^25924428820 is an apocalyptic number.

25924428820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25924428820 is an abundant number, since it is smaller than the sum of its proper divisors (28516871744).

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

25924428820 is a wasteful number, since it uses less digits than its factorization.

25924428820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296221450 (or 1296221448 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 25924428820 in words is "twenty-five billion, nine hundred twenty-four million, four hundred twenty-eight thousand, eight hundred twenty".