25162016161 has 4 divisors (see below), whose sum is σ = 25343038000. Its totient is φ = 24980994324.

The previous prime is 25162016153. The next prime is 25162016189. The reversal of 25162016161 is 16161026152.

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 25162016161 - 2³ = 25162016153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25162016861) 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, 90510711 + ... + 90510988.

It is an arithmetic number, because the mean of its divisors is an integer number (6335759500).

Almost surely, 2^25162016161 is an apocalyptic number.

It is an amenable number.

25162016161 is a deficient number, since it is larger than the sum of its proper divisors (181021839).

25162016161 is a wasteful number, since it uses less digits than its factorization.

25162016161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181021838.

The product of its (nonzero) digits is 4320, while the sum is 31.

Subtracting from 25162016161 its reverse (16161026152), we obtain a palindrome (9000990009).

The spelling of 25162016161 in words is "twenty-five billion, one hundred sixty-two million, sixteen thousand, one hundred sixty-one".