25845139102 has 8 divisors (see below), whose sum is σ = 39499175016. Its totient is φ = 12678747432.

The previous prime is 25845139091. The next prime is 25845139183. The reversal of 25845139102 is 20193154852.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 121910928 + ... + 121911139.

It is an arithmetic number, because the mean of its divisors is an integer number (4937396877).

Almost surely, 2^25845139102 is an apocalyptic number.

25845139102 is a deficient number, since it is larger than the sum of its proper divisors (13654035914).

25845139102 is a wasteful number, since it uses less digits than its factorization.

25845139102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243822122.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 25845139102 in words is "twenty-five billion, eight hundred forty-five million, one hundred thirty-nine thousand, one hundred two".