25651782139 has 4 divisors (see below), whose sum is σ = 26248335256. Its totient is φ = 25055229024.

The previous prime is 25651782127. The next prime is 25651782151. The reversal of 25651782139 is 93128715652.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25651782127) and next prime (25651782151).

It is a cyclic number.

It is not a de Polignac number, because 25651782139 - 2²¹ = 25649684987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25651782092 and 25651782101.

It is not an unprimeable number, because it can be changed into a prime (25651782109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298276494 + ... + 298276579.

It is an arithmetic number, because the mean of its divisors is an integer number (6562083814).

Almost surely, 2^25651782139 is an apocalyptic number.

25651782139 is a deficient number, since it is larger than the sum of its proper divisors (596553117).

25651782139 is an equidigital number, since it uses as much as digits as its factorization.

25651782139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596553116.

The product of its digits is 907200, while the sum is 49.

The spelling of 25651782139 in words is "twenty-five billion, six hundred fifty-one million, seven hundred eighty-two thousand, one hundred thirty-nine".