25164126163 has 4 divisors (see below), whose sum is σ = 27451774008. Its totient is φ = 22876478320.

The previous prime is 25164126139. The next prime is 25164126173. The reversal of 25164126163 is 36162146152.

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 25164126163 - 2⁵ = 25164126131 is a prime.

It is a super-2 number, since 2×25164126163² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25164126173) 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, 1143823906 + ... + 1143823927.

It is an arithmetic number, because the mean of its divisors is an integer number (6862943502).

Almost surely, 2^25164126163 is an apocalyptic number.

25164126163 is a deficient number, since it is larger than the sum of its proper divisors (2287647845).

25164126163 is a wasteful number, since it uses less digits than its factorization.

25164126163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287647844.

The product of its digits is 51840, while the sum is 37.

The spelling of 25164126163 in words is "twenty-five billion, one hundred sixty-four million, one hundred twenty-six thousand, one hundred sixty-three".