25519204493 has 2 divisors, whose sum is σ = 25519204494. Its totient is φ = 25519204492.

The previous prime is 25519204489. The next prime is 25519204507. The reversal of 25519204493 is 39440291552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24279249124 + 1239955369 = 155818^2 + 35213^2 .

It is a cyclic number.

It is not a de Polignac number, because 25519204493 - 2² = 25519204489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25519204093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12759602246 + 12759602247.

It is an arithmetic number, because the mean of its divisors is an integer number (12759602247).

Almost surely, 2^25519204493 is an apocalyptic number.

It is an amenable number.

25519204493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25519204493 is an equidigital number, since it uses as much as digits as its factorization.

25519204493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 25519204493 in words is "twenty-five billion, five hundred nineteen million, two hundred four thousand, four hundred ninety-three".