25456660992 has 320 divisors, whose sum is σ = 86454466560. Its totient is φ = 7244992512.

The previous prime is 25456660969. The next prime is 25456661017. The reversal of 25456660992 is 29906665452.

It is a super-2 number, since 2×25456660992² (a number of 22 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 48674043 + ... + 48674565.

It is an arithmetic number, because the mean of its divisors is an integer number (270170208).

Almost surely, 2^25456660992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25456660992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43227233280).

25456660992 is an abundant number, since it is smaller than the sum of its proper divisors (60997805568).

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

25456660992 is an equidigital number, since it uses as much as digits as its factorization.

25456660992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 25456660992 in words is "twenty-five billion, four hundred fifty-six million, six hundred sixty thousand, nine hundred ninety-two".