25171006507 has 2 divisors, whose sum is σ = 25171006508. Its totient is φ = 25171006506.

The previous prime is 25171006493. The next prime is 25171006513. The reversal of 25171006507 is 70560017152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25171006507 - 2⁷ = 25171006379 is a prime.

It is not a weakly prime, because it can be changed into another prime (25171006577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12585503253 + 12585503254.

It is an arithmetic number, because the mean of its divisors is an integer number (12585503254).

Almost surely, 2^25171006507 is an apocalyptic number.

25171006507 is a deficient number, since it is larger than the sum of its proper divisors (1).

25171006507 is an equidigital number, since it uses as much as digits as its factorization.

25171006507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 25171006507 in words is "twenty-five billion, one hundred seventy-one million, six thousand, five hundred seven".