25244545451 has 4 divisors (see below), whose sum is σ = 25251851352. Its totient is φ = 25237239552.

The previous prime is 25244545439. The next prime is 25244545493. The reversal of 25244545451 is 15454544252.

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

It is a cyclic number.

It is not a de Polignac number, because 25244545451 - 2²⁶ = 25177436587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25244545399 and 25244545408.

It is not an unprimeable number, because it can be changed into a prime (25244547451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3647765 + ... + 3654678.

It is an arithmetic number, because the mean of its divisors is an integer number (6312962838).

Almost surely, 2^25244545451 is an apocalyptic number.

25244545451 is a deficient number, since it is larger than the sum of its proper divisors (7305901).

25244545451 is an equidigital number, since it uses as much as digits as its factorization.

25244545451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7305900.

The product of its digits is 640000, while the sum is 41.

The spelling of 25244545451 in words is "twenty-five billion, two hundred forty-four million, five hundred forty-five thousand, four hundred fifty-one".