25015015139 has 4 divisors (see below), whose sum is σ = 25015343856. Its totient is φ = 25014686424.

The previous prime is 25015015133. The next prime is 25015015153. The reversal of 25015015139 is 93151051052.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25015015139 - 2²⁰ = 25013966563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25015015133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15122 + ... + 224184.

It is an arithmetic number, because the mean of its divisors is an integer number (6253835964).

Almost surely, 2^25015015139 is an apocalyptic number.

25015015139 is a deficient number, since it is larger than the sum of its proper divisors (328717).

25015015139 is a wasteful number, since it uses less digits than its factorization.

25015015139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328716.

The product of its (nonzero) digits is 6750, while the sum is 32.

The spelling of 25015015139 in words is "twenty-five billion, fifteen million, fifteen thousand, one hundred thirty-nine".