25754619920 has 20 divisors (see below), whose sum is σ = 59879491500. Its totient is φ = 10301847936.

The previous prime is 25754619857. The next prime is 25754619923. The reversal of 25754619920 is 2991645752.

It can be written as a sum of positive squares in 2 ways, for example, as 4030218256 + 21724401664 = 63484^2 + 147392^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (25754619923) 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, 160966295 + ... + 160966454.

It is an arithmetic number, because the mean of its divisors is an integer number (2993974575).

Almost surely, 2^25754619920 is an apocalyptic number.

25754619920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25754619920 is an abundant number, since it is smaller than the sum of its proper divisors (34124871580).

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

25754619920 is a wasteful number, since it uses less digits than its factorization.

25754619920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321932762 (or 321932756 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 25754619920 in words is "twenty-five billion, seven hundred fifty-four million, six hundred nineteen thousand, nine hundred twenty".