25945993167 has 16 divisors (see below), whose sum is σ = 34908952320. Its totient is φ = 17140253312.

The previous prime is 25945993163. The next prime is 25945993201. The reversal of 25945993167 is 76139954952.

It is a cyclic number.

It is not a de Polignac number, because 25945993167 - 2² = 25945993163 is a prime.

It is a super-2 number, since 2×25945993167² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25945993167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25945993163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2410684 + ... + 2421422.

It is an arithmetic number, because the mean of its divisors is an integer number (2181809520).

Almost surely, 2^25945993167 is an apocalyptic number.

25945993167 is a deficient number, since it is larger than the sum of its proper divisors (8962959153).

25945993167 is a wasteful number, since it uses less digits than its factorization.

25945993167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17982.

The product of its digits is 18370800, while the sum is 60.

The spelling of 25945993167 in words is "twenty-five billion, nine hundred forty-five million, nine hundred ninety-three thousand, one hundred sixty-seven".