25161161563 has 8 divisors (see below), whose sum is σ = 25975345536. Its totient is φ = 24347136000.

The previous prime is 25161161539. The next prime is 25161161587. The reversal of 25161161563 is 36516116152.

It is an interprime number because it is at equal distance from previous prime (25161161539) and next prime (25161161587).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25161161563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25161161503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341595 + ... + 408667.

It is an arithmetic number, because the mean of its divisors is an integer number (3246918192).

Almost surely, 2^25161161563 is an apocalyptic number.

25161161563 is a deficient number, since it is larger than the sum of its proper divisors (814183973).

25161161563 is a wasteful number, since it uses less digits than its factorization.

25161161563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79205.

The product of its digits is 32400, while the sum is 37.

The spelling of 25161161563 in words is "twenty-five billion, one hundred sixty-one million, one hundred sixty-one thousand, five hundred sixty-three".