25137513889 has 4 divisors (see below), whose sum is σ = 25329403440. Its totient is φ = 24945624340.

The previous prime is 25137513859. The next prime is 25137513923. The reversal of 25137513889 is 98831573152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25137513889 - 2⁷ = 25137513761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25137513859) 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, 95944579 + ... + 95944840.

It is an arithmetic number, because the mean of its divisors is an integer number (6332350860).

Almost surely, 2^25137513889 is an apocalyptic number.

It is an amenable number.

25137513889 is a deficient number, since it is larger than the sum of its proper divisors (191889551).

25137513889 is a wasteful number, since it uses less digits than its factorization.

25137513889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191889550.

The product of its digits is 1814400, while the sum is 52.

The spelling of 25137513889 in words is "twenty-five billion, one hundred thirty-seven million, five hundred thirteen thousand, eight hundred eighty-nine".