25451507453 has 2 divisors, whose sum is σ = 25451507454. Its totient is φ = 25451507452.

The previous prime is 25451507441. The next prime is 25451507467. The reversal of 25451507453 is 35470515452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25434508324 + 16999129 = 159482^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 25451507453 - 2⁸ = 25451507197 is a prime.

It is a super-2 number, since 2×25451507453² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25451507453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25451507353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12725753726 + 12725753727.

It is an arithmetic number, because the mean of its divisors is an integer number (12725753727).

Almost surely, 2^25451507453 is an apocalyptic number.

It is an amenable number.

25451507453 is a deficient number, since it is larger than the sum of its proper divisors (1).

25451507453 is an equidigital number, since it uses as much as digits as its factorization.

25451507453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420000, while the sum is 41.

The spelling of 25451507453 in words is "twenty-five billion, four hundred fifty-one million, five hundred seven thousand, four hundred fifty-three".