25712009647 has 2 divisors, whose sum is σ = 25712009648. Its totient is φ = 25712009646.

The previous prime is 25712009639. The next prime is 25712009671. The reversal of 25712009647 is 74690021752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25712009647 - 2³ = 25712009639 is a prime.

It is a super-2 number, since 2×25712009647² (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 (25712009747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12856004823 + 12856004824.

It is an arithmetic number, because the mean of its divisors is an integer number (12856004824).

Almost surely, 2^25712009647 is an apocalyptic number.

25712009647 is a deficient number, since it is larger than the sum of its proper divisors (1).

25712009647 is an equidigital number, since it uses as much as digits as its factorization.

25712009647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 25712009647 in words is "twenty-five billion, seven hundred twelve million, nine thousand, six hundred forty-seven".