25305252780 has 48 divisors (see below), whose sum is σ = 71912252160. Its totient is φ = 6647348928.

The previous prime is 25305252779. The next prime is 25305252823. The reversal of 25305252780 is 8725250352.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3143400 + ... + 3151439.

It is an arithmetic number, because the mean of its divisors is an integer number (1498171920).

Almost surely, 2^25305252780 is an apocalyptic number.

25305252780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25305252780 is an abundant number, since it is smaller than the sum of its proper divisors (46606999380).

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

25305252780 is a wasteful number, since it uses less digits than its factorization.

25305252780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6294918 (or 6294916 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 39.

The spelling of 25305252780 in words is "twenty-five billion, three hundred five million, two hundred fifty-two thousand, seven hundred eighty".