25716133906 has 8 divisors (see below), whose sum is σ = 38928092940. Its totient is φ = 12740102928.

The previous prime is 25716133901. The next prime is 25716133907. The reversal of 25716133906 is 60933161752.

It can be written as a sum of positive squares in 2 ways, for example, as 25666923681 + 49210225 = 160209^2 + 7015^2 .

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

It is a super-2 number, since 2×25716133906² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25716133901) 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, 58981741 + ... + 58982176.

Almost surely, 2^25716133906 is an apocalyptic number.

25716133906 is a deficient number, since it is larger than the sum of its proper divisors (13211959034).

25716133906 is a wasteful number, since it uses less digits than its factorization.

25716133906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117964028.

The product of its (nonzero) digits is 204120, while the sum is 43.

The spelling of 25716133906 in words is "twenty-five billion, seven hundred sixteen million, one hundred thirty-three thousand, nine hundred six".