25871006137 has 4 divisors (see below), whose sum is σ = 25887666420. Its totient is φ = 25854345856.

The previous prime is 25871006129. The next prime is 25871006153. The reversal of 25871006137 is 73160017852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6204870441 + 19666135696 = 78771^2 + 140236^2 .

It is a cyclic number.

It is not a de Polignac number, because 25871006137 - 2³ = 25871006129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25871006137.

It is not an unprimeable number, because it can be changed into a prime (25871006167) 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, 8327812 + ... + 8330917.

It is an arithmetic number, because the mean of its divisors is an integer number (6471916605).

Almost surely, 2^25871006137 is an apocalyptic number.

It is an amenable number.

25871006137 is a deficient number, since it is larger than the sum of its proper divisors (16660283).

25871006137 is a wasteful number, since it uses less digits than its factorization.

25871006137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16660282.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 25871006137 in words is "twenty-five billion, eight hundred seventy-one million, six thousand, one hundred thirty-seven".