25465856453 has 2 divisors, whose sum is σ = 25465856454. Its totient is φ = 25465856452.

The previous prime is 25465856443. The next prime is 25465856461. The reversal of 25465856453 is 35465856452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20459869444 + 5005987009 = 143038^2 + 70753^2 .

It is a cyclic number.

It is not a de Polignac number, because 25465856453 - 2²⁶ = 25398747589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25465856395 and 25465856404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25465856443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12732928226 + 12732928227.

It is an arithmetic number, because the mean of its divisors is an integer number (12732928227).

Almost surely, 2^25465856453 is an apocalyptic number.

It is an amenable number.

25465856453 is a deficient number, since it is larger than the sum of its proper divisors (1).

25465856453 is an equidigital number, since it uses as much as digits as its factorization.

25465856453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280000, while the sum is 53.

Subtracting 25465856453 from its reverse (35465856452), we obtain a palindrome (9999999999).

The spelling of 25465856453 in words is "twenty-five billion, four hundred sixty-five million, eight hundred fifty-six thousand, four hundred fifty-three".