25482312891 has 48 divisors (see below), whose sum is σ = 42480082944. Its totient is φ = 14418456192.

The previous prime is 25482312853. The next prime is 25482312923. The reversal of 25482312891 is 19821328452.

25482312891 is a `hidden beast` number, since 2 + 548 + 2 + 3 + 12 + 8 + 91 = 666.

It is not a de Polignac number, because 25482312891 - 2⁷ = 25482312763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25482312851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4501735 + ... + 4507391.

It is an arithmetic number, because the mean of its divisors is an integer number (885001728).

Almost surely, 2^25482312891 is an apocalyptic number.

25482312891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25482312891 is a deficient number, since it is larger than the sum of its proper divisors (16997770053).

25482312891 is a wasteful number, since it uses less digits than its factorization.

25482312891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360 (or 6357 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 25482312891 in words is "twenty-five billion, four hundred eighty-two million, three hundred twelve thousand, eight hundred ninety-one".