28144502625 has 16 divisors (see below), whose sum is σ = 46832452992. Its totient is φ = 15010401200.

The previous prime is 28144502599. The next prime is 28144502627. The reversal of 28144502625 is 52620544182.

It is not a de Polignac number, because 28144502625 - 2¹¹ = 28144500577 is a prime.

It is a super-2 number, since 2×28144502625² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28144502627) 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, 37525629 + ... + 37526378.

It is an arithmetic number, because the mean of its divisors is an integer number (2927028312).

Almost surely, 2^28144502625 is an apocalyptic number.

28144502625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28144502625 is a deficient number, since it is larger than the sum of its proper divisors (18687950367).

28144502625 is an equidigital number, since it uses as much as digits as its factorization.

28144502625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75052025 (or 75052015 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 28144502625 in words is "twenty-eight billion, one hundred forty-four million, five hundred two thousand, six hundred twenty-five".