25384745990819 has 2 divisors, whose sum is σ = 25384745990820. Its totient is φ = 25384745990818.

The previous prime is 25384745990789. The next prime is 25384745990887. The reversal of 25384745990819 is 91809954748352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25384745990819 - 2⁸ = 25384745990563 is a prime.

It is a super-3 number, since 3×25384745990819³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (25384745990899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12692372995409 + 12692372995410.

It is an arithmetic number, because the mean of its divisors is an integer number (12692372995410).

Almost surely, 2^{25384745990819} is an apocalyptic number.

25384745990819 is a deficient number, since it is larger than the sum of its proper divisors (1).

25384745990819 is an equidigital number, since it uses as much as digits as its factorization.

25384745990819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 783820800, while the sum is 74.

The spelling of 25384745990819 in words is "twenty-five trillion, three hundred eighty-four billion, seven hundred forty-five million, nine hundred ninety thousand, eight hundred nineteen".