25136605139 has 4 divisors (see below), whose sum is σ = 25180170024. Its totient is φ = 25093040256.

The previous prime is 25136605121. The next prime is 25136605141. The reversal of 25136605139 is 93150663152.

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 25136605139 - 2²⁴ = 25119827923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25136605096 and 25136605105.

It is not an unprimeable number, because it can be changed into a prime (25133605139) 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, 21781577 + ... + 21782730.

It is an arithmetic number, because the mean of its divisors is an integer number (6295042506).

Almost surely, 2^25136605139 is an apocalyptic number.

25136605139 is a deficient number, since it is larger than the sum of its proper divisors (43564885).

25136605139 is an equidigital number, since it uses as much as digits as its factorization.

25136605139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43564884.

The product of its (nonzero) digits is 145800, while the sum is 41.

The spelling of 25136605139 in words is "twenty-five billion, one hundred thirty-six million, six hundred five thousand, one hundred thirty-nine".