25438974019 has 2 divisors, whose sum is σ = 25438974020. Its totient is φ = 25438974018.

The previous prime is 25438974013. The next prime is 25438974037. The reversal of 25438974019 is 91047983452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25438974019 - 2¹⁹ = 25438449731 is a prime.

It is a super-2 number, since 2×25438974019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25438974013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12719487009 + 12719487010.

It is an arithmetic number, because the mean of its divisors is an integer number (12719487010).

Almost surely, 2^25438974019 is an apocalyptic number.

25438974019 is a deficient number, since it is larger than the sum of its proper divisors (1).

25438974019 is an equidigital number, since it uses as much as digits as its factorization.

25438974019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 25438974019 in words is "twenty-five billion, four hundred thirty-eight million, nine hundred seventy-four thousand, nineteen".