25546872906 has 32 divisors (see below), whose sum is σ = 56975810880. Its totient is φ = 8484877008.

The previous prime is 25546872829. The next prime is 25546872919. The reversal of 25546872906 is 60927864552.

25546872906 is a `hidden beast` number, since 2 + 5 + 546 + 8 + 7 + 2 + 90 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 838996 + ... + 868911.

It is an arithmetic number, because the mean of its divisors is an integer number (1780494090).

Almost surely, 2^25546872906 is an apocalyptic number.

25546872906 is an abundant number, since it is smaller than the sum of its proper divisors (31428937974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25546872906 is a wasteful number, since it uses less digits than its factorization.

25546872906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708195 (or 1708189 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 25546872906 in words is "twenty-five billion, five hundred forty-six million, eight hundred seventy-two thousand, nine hundred six".