25777130784 has 24 divisors (see below), whose sum is σ = 67664968560. Its totient is φ = 8592376896.

The previous prime is 25777130783. The next prime is 25777130789. The reversal of 25777130784 is 48703177752.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25777130783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134255794 + ... + 134255985.

It is an arithmetic number, because the mean of its divisors is an integer number (2819373690).

Almost surely, 2^25777130784 is an apocalyptic number.

25777130784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25777130784 is an abundant number, since it is smaller than the sum of its proper divisors (41887837776).

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

25777130784 is a wasteful number, since it uses less digits than its factorization.

25777130784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268511792 (or 268511784 counting only the distinct ones).

The product of its (nonzero) digits is 2304960, while the sum is 51.

The spelling of 25777130784 in words is "twenty-five billion, seven hundred seventy-seven million, one hundred thirty thousand, seven hundred eighty-four".