25440992466 has 32 divisors (see below), whose sum is σ = 51225991488. Its totient is φ = 8423039040.

The previous prime is 25440992453. The next prime is 25440992477. The reversal of 25440992466 is 66429904452.

It is a super-2 number, since 2×25440992466² (a number of 22 digits) contains 22 as substring.

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, 4229401 + ... + 4235411.

It is an arithmetic number, because the mean of its divisors is an integer number (1600812234).

Almost surely, 2^25440992466 is an apocalyptic number.

25440992466 is an abundant number, since it is smaller than the sum of its proper divisors (25784999022).

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

25440992466 is a wasteful number, since it uses less digits than its factorization.

25440992466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10666.

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 25440992466 in words is "twenty-five billion, four hundred forty million, nine hundred ninety-two thousand, four hundred sixty-six".