28151358625 has 16 divisors (see below), whose sum is σ = 37835428176. Its totient is φ = 20788694400.

The previous prime is 28151358617. The next prime is 28151358649. The reversal of 28151358625 is 52685315182.

It can be written as a sum of positive squares in 8 ways, for example, as 5506827264 + 22644531361 = 74208^2 + 150481^2 .

It is not a de Polignac number, because 28151358625 - 2³ = 28151358617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8660332 + ... + 8663581.

It is an arithmetic number, because the mean of its divisors is an integer number (2364714261).

Almost surely, 2^28151358625 is an apocalyptic number.

28151358625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28151358625 is a deficient number, since it is larger than the sum of its proper divisors (9684069551).

28151358625 is a wasteful number, since it uses less digits than its factorization.

28151358625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17323941 (or 17323931 counting only the distinct ones).

The product of its digits is 576000, while the sum is 46.

The spelling of 28151358625 in words is "twenty-eight billion, one hundred fifty-one million, three hundred fifty-eight thousand, six hundred twenty-five".