25466521720 has 16 divisors (see below), whose sum is σ = 57299673960. Its totient is φ = 10186608672.

The previous prime is 25466521687. The next prime is 25466521723. The reversal of 25466521720 is 2712566452.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 636663043 = 25466521720 / (2 + 5 + 4 + 6 + 6 + 5 + 2 + 1 + 7 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25466521723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318331482 + ... + 318331561.

Almost surely, 2^25466521720 is an apocalyptic number.

25466521720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25466521720 is an abundant number, since it is smaller than the sum of its proper divisors (31833152240).

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

25466521720 is a wasteful number, since it uses less digits than its factorization.

25466521720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636663054 (or 636663050 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 25466521720 in words is "twenty-five billion, four hundred sixty-six million, five hundred twenty-one thousand, seven hundred twenty".