28612372825 has 6 divisors (see below), whose sum is σ = 35479342334. Its totient is φ = 22889898240.

The previous prime is 28612372819. The next prime is 28612372843. The reversal of 28612372825 is 52827321682.

It can be written as a sum of positive squares in 3 ways, for example, as 397444096 + 28214928729 = 19936^2 + 167973^2 .

It is not a de Polignac number, because 28612372825 - 2⁷ = 28612372697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572247432 + ... + 572247481.

Almost surely, 2^28612372825 is an apocalyptic number.

28612372825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28612372825 is a deficient number, since it is larger than the sum of its proper divisors (6866969509).

28612372825 is a wasteful number, since it uses less digits than its factorization.

28612372825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144494923 (or 1144494918 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The spelling of 28612372825 in words is "twenty-eight billion, six hundred twelve million, three hundred seventy-two thousand, eight hundred twenty-five".