25667117715997 has 16 divisors (see below), whose sum is σ = 26025439491072. Its totient is φ = 25311979487680.

The previous prime is 25667117715991. The next prime is 25667117716057. The reversal of 25667117715997 is 79951771176652.

It is a happy number.

It is not a de Polignac number, because 25667117715997 - 2³ = 25667117715989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25667117715991) 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 15 ways as a sum of consecutive naturals, for example, 10346643 + ... + 12585199.

It is an arithmetic number, because the mean of its divisors is an integer number (1626589968192).

Almost surely, 2^{25667117715997} is an apocalyptic number.

It is an amenable number.

25667117715997 is a deficient number, since it is larger than the sum of its proper divisors (358321775075).

25667117715997 is a wasteful number, since it uses less digits than its factorization.

25667117715997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239268.

The product of its digits is 350065800, while the sum is 73.

The spelling of 25667117715997 in words is "twenty-five trillion, six hundred sixty-seven billion, one hundred seventeen million, seven hundred fifteen thousand, nine hundred ninety-seven".