25306615040 has 72 divisors (see below), whose sum is σ = 69276883200. Its totient is φ = 8676550656.

The previous prime is 25306615031. The next prime is 25306615049. The reversal of 25306615040 is 4051660352.

It is an interprime number because it is at equal distance from previous prime (25306615031) and next prime (25306615049).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 25306614988 and 25306615006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25306615049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403240 + ... + 1421159.

Almost surely, 2^25306615040 is an apocalyptic number.

25306615040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25306615040 is an abundant number, since it is smaller than the sum of its proper divisors (43970268160).

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

25306615040 is an equidigital number, since it uses as much as digits as its factorization.

25306615040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824427 (or 2824413 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 25306615040 in words is "twenty-five billion, three hundred six million, six hundred fifteen thousand, forty".