25278578732 has 24 divisors (see below), whose sum is σ = 49381413312. Its totient is φ = 11223046800.

The previous prime is 25278578641. The next prime is 25278578737. The reversal of 25278578732 is 23787587252.

It is not an unprimeable number, because it can be changed into a prime (25278578737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6678494 + ... + 6682277.

It is an arithmetic number, because the mean of its divisors is an integer number (2057558888).

Almost surely, 2^25278578732 is an apocalyptic number.

25278578732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25278578732 is a deficient number, since it is larger than the sum of its proper divisors (24102834580).

25278578732 is a wasteful number, since it uses less digits than its factorization.

25278578732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360829 (or 13360827 counting only the distinct ones).

The product of its digits is 13171200, while the sum is 56.

The spelling of 25278578732 in words is "twenty-five billion, two hundred seventy-eight million, five hundred seventy-eight thousand, seven hundred thirty-two".