25005415920 has 80 divisors (see below), whose sum is σ = 80017354752. Its totient is φ = 6453008640.

The previous prime is 25005415907. The next prime is 25005415927. The reversal of 25005415920 is 2951450052.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25005415927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1673032 + ... + 1687911.

Almost surely, 2^25005415920 is an apocalyptic number.

25005415920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25005415920 is an abundant number, since it is smaller than the sum of its proper divisors (55011938832).

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

25005415920 is a wasteful number, since it uses less digits than its factorization.

25005415920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360990 (or 3360984 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 25005415920 its reverse (2951450052), we get a palindrome (27956865972).

The spelling of 25005415920 in words is "twenty-five billion, five million, four hundred fifteen thousand, nine hundred twenty".