25040949100 has 72 divisors (see below), whose sum is σ = 55450457888. Its totient is φ = 9813312000.

The previous prime is 25040949013. The next prime is 25040949127. The reversal of 25040949100 is 194904052.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1090942 + ... + 1113658.

Almost surely, 2^25040949100 is an apocalyptic number.

25040949100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25040949100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27725228944).

25040949100 is an abundant number, since it is smaller than the sum of its proper divisors (30409508788).

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

25040949100 is a wasteful number, since it uses less digits than its factorization.

25040949100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22955 (or 22948 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 25040949100 in words is "twenty-five billion, forty million, nine hundred forty-nine thousand, one hundred".