28277507825 has 48 divisors (see below), whose sum is σ = 40698228480. Its totient is φ = 19090080000.

The previous prime is 28277507749. The next prime is 28277507893. The reversal of 28277507825 is 52870577282.

It is not a de Polignac number, because 28277507825 - 2²² = 28273313521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3194756 + ... + 3203594.

It is an arithmetic number, because the mean of its divisors is an integer number (847879760).

Almost surely, 2^28277507825 is an apocalyptic number.

28277507825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28277507825 is a deficient number, since it is larger than the sum of its proper divisors (12420720655).

28277507825 is a wasteful number, since it uses less digits than its factorization.

28277507825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138 (or 9133 counting only the distinct ones).

The product of its (nonzero) digits is 4390400, while the sum is 53.

The spelling of 28277507825 in words is "twenty-eight billion, two hundred seventy-seven million, five hundred seven thousand, eight hundred twenty-five".