25449961224 has 32 divisors (see below), whose sum is σ = 63633162240. Its totient is φ = 8482219200.

The previous prime is 25449961223. The next prime is 25449961249. The reversal of 25449961224 is 42216994452.

It is not an unprimeable number, because it can be changed into a prime (25449961223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131854 + ... + 261314.

It is an arithmetic number, because the mean of its divisors is an integer number (1988536320).

Almost surely, 2^25449961224 is an apocalyptic number.

25449961224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25449961224 is an abundant number, since it is smaller than the sum of its proper divisors (38183201016).

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

25449961224 is a wasteful number, since it uses less digits than its factorization.

25449961224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137661 (or 137657 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The spelling of 25449961224 in words is "twenty-five billion, four hundred forty-nine million, nine hundred sixty-one thousand, two hundred twenty-four".