25464646253 has 4 divisors (see below), whose sum is σ = 26085735228. Its totient is φ = 24843557280.

The previous prime is 25464646211. The next prime is 25464646267. The reversal of 25464646253 is 35264646452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9690039844 + 15774606409 = 98438^2 + 125597^2 .

It is a cyclic number.

It is not a de Polignac number, because 25464646253 - 2¹⁰ = 25464645229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25464646198 and 25464646207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25464646553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310544426 + ... + 310544507.

It is an arithmetic number, because the mean of its divisors is an integer number (6521433807).

Almost surely, 2^25464646253 is an apocalyptic number.

It is an amenable number.

25464646253 is a deficient number, since it is larger than the sum of its proper divisors (621088975).

25464646253 is an equidigital number, since it uses as much as digits as its factorization.

25464646253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621088974.

The product of its digits is 4147200, while the sum is 47.

The spelling of 25464646253 in words is "twenty-five billion, four hundred sixty-four million, six hundred forty-six thousand, two hundred fifty-three".