25117417920 has 112 divisors (see below), whose sum is σ = 91140369408. Its totient is φ = 5741122560.

The previous prime is 25117417901. The next prime is 25117417967. The reversal of 25117417920 is 2971471152.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1862136 + ... + 1875575.

Almost surely, 2^25117417920 is an apocalyptic number.

25117417920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25117417920 is an abundant number, since it is smaller than the sum of its proper divisors (66022951488).

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

25117417920 is a wasteful number, since it uses less digits than its factorization.

25117417920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737738 (or 3737728 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The spelling of 25117417920 in words is "twenty-five billion, one hundred seventeen million, four hundred seventeen thousand, nine hundred twenty".