25172386807 has 2 divisors, whose sum is σ = 25172386808. Its totient is φ = 25172386806.

The previous prime is 25172386801. The next prime is 25172386859. The reversal of 25172386807 is 70868327152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25172386807 is a prime.

It is a super-2 number, since 2×25172386807² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25172386801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12586193403 + 12586193404.

It is an arithmetic number, because the mean of its divisors is an integer number (12586193404).

Almost surely, 2^25172386807 is an apocalyptic number.

25172386807 is a deficient number, since it is larger than the sum of its proper divisors (1).

25172386807 is an equidigital number, since it uses as much as digits as its factorization.

25172386807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 25172386807 in words is "twenty-five billion, one hundred seventy-two million, three hundred eighty-six thousand, eight hundred seven".