25781117362 has 64 divisors (see below), whose sum is σ = 51991962624. Its totient is φ = 9259583040.

The previous prime is 25781117333. The next prime is 25781117393. The reversal of 25781117362 is 26371118752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1567393 + ... + 1583755.

It is an arithmetic number, because the mean of its divisors is an integer number (812374416).

Almost surely, 2^25781117362 is an apocalyptic number.

25781117362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25781117362 is an abundant number, since it is smaller than the sum of its proper divisors (26210845262).

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

25781117362 is a wasteful number, since it uses less digits than its factorization.

25781117362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17183.

The product of its digits is 141120, while the sum is 43.

The spelling of 25781117362 in words is "twenty-five billion, seven hundred eighty-one million, one hundred seventeen thousand, three hundred sixty-two".