25820480560 has 80 divisors (see below), whose sum is σ = 69063293952. Its totient is φ = 8794080000.

The previous prime is 25820480507. The next prime is 25820480561. The reversal of 25820480560 is 6508402852.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (25820480561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68116 + ... + 237235.

Almost surely, 2^25820480560 is an apocalyptic number.

25820480560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25820480560 is an abundant number, since it is smaller than the sum of its proper divisors (43242813392).

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

25820480560 is a wasteful number, since it uses less digits than its factorization.

25820480560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305522 (or 305516 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 25820480560 in words is "twenty-five billion, eight hundred twenty million, four hundred eighty thousand, five hundred sixty".