25421838619 has 2 divisors, whose sum is σ = 25421838620. Its totient is φ = 25421838618.

The previous prime is 25421838587. The next prime is 25421838653. The reversal of 25421838619 is 91683812452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25421838619 - 2⁵ = 25421838587 is a prime.

It is a super-2 number, since 2×25421838619² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25421838719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710919309 + 12710919310.

It is an arithmetic number, because the mean of its divisors is an integer number (12710919310).

Almost surely, 2^25421838619 is an apocalyptic number.

25421838619 is a deficient number, since it is larger than the sum of its proper divisors (1).

25421838619 is an equidigital number, since it uses as much as digits as its factorization.

25421838619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The spelling of 25421838619 in words is "twenty-five billion, four hundred twenty-one million, eight hundred thirty-eight thousand, six hundred nineteen".