25583450623 has 2 divisors, whose sum is σ = 25583450624. Its totient is φ = 25583450622.

The previous prime is 25583450621. The next prime is 25583450647. The reversal of 25583450623 is 32605438552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25583450623 - 2¹ = 25583450621 is a prime.

Together with 25583450621, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25583450623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25583450621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12791725311 + 12791725312.

It is an arithmetic number, because the mean of its divisors is an integer number (12791725312).

Almost surely, 2^25583450623 is an apocalyptic number.

25583450623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25583450623 is an equidigital number, since it uses as much as digits as its factorization.

25583450623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 25583450623 in words is "twenty-five billion, five hundred eighty-three million, four hundred fifty thousand, six hundred twenty-three".