25481278560 has 48 divisors (see below), whose sum is σ = 80266028976. Its totient is φ = 6795007488.

The previous prime is 25481278541. The next prime is 25481278583. The reversal of 25481278560 is 6587218452.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 26542519 + ... + 26543478.

It is an arithmetic number, because the mean of its divisors is an integer number (1672208937).

Almost surely, 2^25481278560 is an apocalyptic number.

25481278560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25481278560 is an abundant number, since it is smaller than the sum of its proper divisors (54784750416).

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

25481278560 is a wasteful number, since it uses less digits than its factorization.

25481278560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53086015 (or 53086007 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 25481278560 in words is "twenty-five billion, four hundred eighty-one million, two hundred seventy-eight thousand, five hundred sixty".