25045664453 has 4 divisors (see below), whose sum is σ = 25228479660. Its totient is φ = 24862849248.

The previous prime is 25045664447. The next prime is 25045664461. The reversal of 25045664453 is 35446654052.

It is a happy number.

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 17354900644 + 7690763809 = 131738^2 + 87697^2 .

It is a cyclic number.

It is not a de Polignac number, because 25045664453 - 2¹⁶ = 25045598917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25045664053) 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, 91407398 + ... + 91407671.

It is an arithmetic number, because the mean of its divisors is an integer number (6307119915).

Almost surely, 2^25045664453 is an apocalyptic number.

It is an amenable number.

25045664453 is a deficient number, since it is larger than the sum of its proper divisors (182815207).

25045664453 is a wasteful number, since it uses less digits than its factorization.

25045664453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182815206.

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 25045664453 in words is "twenty-five billion, forty-five million, six hundred sixty-four thousand, four hundred fifty-three".