25456407247 has 2 divisors, whose sum is σ = 25456407248. Its totient is φ = 25456407246.

The previous prime is 25456407241. The next prime is 25456407287. The reversal of 25456407247 is 74270465452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25456407247 - 2³ = 25456407239 is a prime.

It is a super-2 number, since 2×25456407247² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25456407197 and 25456407206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25456407241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728203623 + 12728203624.

It is an arithmetic number, because the mean of its divisors is an integer number (12728203624).

Almost surely, 2^25456407247 is an apocalyptic number.

25456407247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25456407247 is an equidigital number, since it uses as much as digits as its factorization.

25456407247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1881600, while the sum is 46.

The spelling of 25456407247 in words is "twenty-five billion, four hundred fifty-six million, four hundred seven thousand, two hundred forty-seven".