25945993166 has 8 divisors (see below), whose sum is σ = 38964089664. Its totient is φ = 12957963280.

The previous prime is 25945993163. The next prime is 25945993201. The reversal of 25945993166 is 66139954952.

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

It is a super-2 number, since 2×25945993166² (a number of 22 digits) contains 22 as substring.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7514495 + ... + 7517946.

It is an arithmetic number, because the mean of its divisors is an integer number (4870511208).

Almost surely, 2^25945993166 is an apocalyptic number.

25945993166 is a deficient number, since it is larger than the sum of its proper divisors (13018096498).

25945993166 is a wasteful number, since it uses less digits than its factorization.

25945993166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15033306.

The product of its digits is 15746400, while the sum is 59.

The spelling of 25945993166 in words is "twenty-five billion, nine hundred forty-five million, nine hundred ninety-three thousand, one hundred sixty-six".