25155234163 has 4 divisors (see below), whose sum is σ = 25192391760. Its totient is φ = 25118076568.

The previous prime is 25155234151. The next prime is 25155234173. The reversal of 25155234163 is 36143255152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25155234163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25155234103) 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, 18577783 + ... + 18579136.

It is an arithmetic number, because the mean of its divisors is an integer number (6298097940).

Almost surely, 2^25155234163 is an apocalyptic number.

25155234163 is a deficient number, since it is larger than the sum of its proper divisors (37157597).

25155234163 is an equidigital number, since it uses as much as digits as its factorization.

25155234163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37157596.

The product of its digits is 108000, while the sum is 37.

The spelling of 25155234163 in words is "twenty-five billion, one hundred fifty-five million, two hundred thirty-four thousand, one hundred sixty-three".