25952940139 has 4 divisors (see below), whose sum is σ = 29660503024. Its totient is φ = 22245377256.

The previous prime is 25952940133. The next prime is 25952940173. The reversal of 25952940139 is 93104925952.

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

It is a cyclic number.

It is not a de Polignac number, because 25952940139 - 2³³ = 17363005547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25952940092 and 25952940101.

It is not an unprimeable number, because it can be changed into a prime (25952940133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853781432 + ... + 1853781445.

It is an arithmetic number, because the mean of its divisors is an integer number (7415125756).

Almost surely, 2^25952940139 is an apocalyptic number.

25952940139 is a deficient number, since it is larger than the sum of its proper divisors (3707562885).

25952940139 is an equidigital number, since it uses as much as digits as its factorization.

25952940139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707562884.

The product of its (nonzero) digits is 874800, while the sum is 49.

The spelling of 25952940139 in words is "twenty-five billion, nine hundred fifty-two million, nine hundred forty thousand, one hundred thirty-nine".