25501679280 has 960 divisors, whose sum is σ = 112852776960. Its totient is φ = 5179299840.

The previous prime is 25501679239. The next prime is 25501679297. The reversal of 25501679280 is 8297610552.

25501679280 is a `hidden beast` number, since 2 + 5 + 501 + 67 + 9 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 96964429 + ... + 96964691.

It is an arithmetic number, because the mean of its divisors is an integer number (117554976).

Almost surely, 2^25501679280 is an apocalyptic number.

25501679280 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 25501679280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56426388480).

25501679280 is an abundant number, since it is smaller than the sum of its proper divisors (87351097680).

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

25501679280 is a wasteful number, since it uses less digits than its factorization.

25501679280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 25501679280 in words is "twenty-five billion, five hundred one million, six hundred seventy-nine thousand, two hundred eighty".