25859547919 has 2 divisors, whose sum is σ = 25859547920. Its totient is φ = 25859547918.

The previous prime is 25859547877. The next prime is 25859547949. The reversal of 25859547919 is 91974595852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25859547919 is a prime.

It is a super-2 number, since 2×25859547919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25859547949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12929773959 + 12929773960.

It is an arithmetic number, because the mean of its divisors is an integer number (12929773960).

Almost surely, 2^25859547919 is an apocalyptic number.

25859547919 is a deficient number, since it is larger than the sum of its proper divisors (1).

25859547919 is an equidigital number, since it uses as much as digits as its factorization.

25859547919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824000, while the sum is 64.

The spelling of 25859547919 in words is "twenty-five billion, eight hundred fifty-nine million, five hundred forty-seven thousand, nine hundred nineteen".