25506570380 has 12 divisors (see below), whose sum is σ = 53563797840. Its totient is φ = 10202628144.

The previous prime is 25506570343. The next prime is 25506570403. The reversal of 25506570380 is 8307560552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637664240 + ... + 637664279.

It is an arithmetic number, because the mean of its divisors is an integer number (4463649820).

Almost surely, 2^25506570380 is an apocalyptic number.

25506570380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25506570380 is an abundant number, since it is smaller than the sum of its proper divisors (28057227460).

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

25506570380 is a wasteful number, since it uses less digits than its factorization.

25506570380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275328528 (or 1275328526 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 25506570380 in words is "twenty-five billion, five hundred six million, five hundred seventy thousand, three hundred eighty".