25256772407 has 2 divisors, whose sum is σ = 25256772408. Its totient is φ = 25256772406.

The previous prime is 25256772379. The next prime is 25256772413. The reversal of 25256772407 is 70427765252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25256772407 - 2¹² = 25256768311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25256772467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12628386203 + 12628386204.

It is an arithmetic number, because the mean of its divisors is an integer number (12628386204).

Almost surely, 2^25256772407 is an apocalyptic number.

25256772407 is a deficient number, since it is larger than the sum of its proper divisors (1).

25256772407 is an equidigital number, since it uses as much as digits as its factorization.

25256772407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1646400, while the sum is 47.

The spelling of 25256772407 in words is "twenty-five billion, two hundred fifty-six million, seven hundred seventy-two thousand, four hundred seven".