28177085025 has 72 divisors (see below), whose sum is σ = 53193678720. Its totient is φ = 14218312320.

The previous prime is 28177085017. The next prime is 28177085033. The reversal of 28177085025 is 52058077182.

It is an interprime number because it is at equal distance from previous prime (28177085017) and next prime (28177085033).

It is not a de Polignac number, because 28177085025 - 2³ = 28177085017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3642712 + ... + 3650438.

Almost surely, 2^28177085025 is an apocalyptic number.

28177085025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28177085025 is a deficient number, since it is larger than the sum of its proper divisors (25016593695).

28177085025 is a wasteful number, since it uses less digits than its factorization.

28177085025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8615 (or 8607 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The spelling of 28177085025 in words is "twenty-eight billion, one hundred seventy-seven million, eighty-five thousand, twenty-five".