25617916163 has 16 divisors (see below), whose sum is σ = 30823921920. Its totient is φ = 20798889696.

The previous prime is 25617916157. The next prime is 25617916169. The reversal of 25617916163 is 36161971652.

It is an interprime number because it is at equal distance from previous prime (25617916157) and next prime (25617916169).

It is a cyclic number.

It is not a de Polignac number, because 25617916163 - 2⁴ = 25617916147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25617916169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 962156 + ... + 988422.

It is an arithmetic number, because the mean of its divisors is an integer number (1926495120).

Almost surely, 2^25617916163 is an apocalyptic number.

25617916163 is a deficient number, since it is larger than the sum of its proper divisors (5206005757).

25617916163 is a wasteful number, since it uses less digits than its factorization.

25617916163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33626.

The product of its digits is 408240, while the sum is 47.

The spelling of 25617916163 in words is "twenty-five billion, six hundred seventeen million, nine hundred sixteen thousand, one hundred sixty-three".