25263900139 has 4 divisors (see below), whose sum is σ = 25308145720. Its totient is φ = 25219654560.

The previous prime is 25263900131. The next prime is 25263900161. The reversal of 25263900139 is 93100936252.

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 25263900139 - 2³ = 25263900131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25263900131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22121934 + ... + 22123075.

It is an arithmetic number, because the mean of its divisors is an integer number (6327036430).

Almost surely, 2^25263900139 is an apocalyptic number.

25263900139 is a deficient number, since it is larger than the sum of its proper divisors (44245581).

25263900139 is an equidigital number, since it uses as much as digits as its factorization.

25263900139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44245580.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 25263900139 in words is "twenty-five billion, two hundred sixty-three million, nine hundred thousand, one hundred thirty-nine".