25128648744 has 32 divisors (see below), whose sum is σ = 64006938720. Its totient is φ = 8218174016.

The previous prime is 25128648739. The next prime is 25128648749. The reversal of 25128648744 is 44784682152.

It is an interprime number because it is at equal distance from previous prime (25128648739) and next prime (25128648749).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25128648749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9876342 + ... + 9878885.

It is an arithmetic number, because the mean of its divisors is an integer number (2000216835).

Almost surely, 2^25128648744 is an apocalyptic number.

25128648744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25128648744 is an abundant number, since it is smaller than the sum of its proper divisors (38878289976).

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

25128648744 is a wasteful number, since it uses less digits than its factorization.

25128648744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19755289 (or 19755285 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 51.

The spelling of 25128648744 in words is "twenty-five billion, one hundred twenty-eight million, six hundred forty-eight thousand, seven hundred forty-four".