25015495680 has 660 divisors, whose sum is σ = 104361431328. Its totient is φ = 5713182720.

The previous prime is 25015495643. The next prime is 25015495691. The reversal of 25015495680 is 8659451052.

25015495680 is a `hidden beast` number, since 2 + 50 + 1 + 549 + 56 + 8 + 0 = 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 59 ways as a sum of consecutive naturals, for example, 20320665 + ... + 20321895.

Almost surely, 2^25015495680 is an apocalyptic number.

25015495680 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 25015495680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52180715664).

25015495680 is an abundant number, since it is smaller than the sum of its proper divisors (79345935648).

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

25015495680 is a wasteful number, since it uses less digits than its factorization.

25015495680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 25015495680 in words is "twenty-five billion, fifteen million, four hundred ninety-five thousand, six hundred eighty".