25305027780 has 24 divisors (see below), whose sum is σ = 70854077952. Its totient is φ = 6748007392.

The previous prime is 25305027779. The next prime is 25305027829. The reversal of 25305027780 is 8772050352.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210875172 + ... + 210875291.

It is an arithmetic number, because the mean of its divisors is an integer number (2952253248).

Almost surely, 2^25305027780 is an apocalyptic number.

25305027780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25305027780 is an abundant number, since it is smaller than the sum of its proper divisors (45549050172).

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

25305027780 is a wasteful number, since it uses less digits than its factorization.

25305027780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421750475 (or 421750473 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 25305027780 in words is "twenty-five billion, three hundred five million, twenty-seven thousand, seven hundred eighty".