25719896820061 has 2 divisors, whose sum is σ = 25719896820062. Its totient is φ = 25719896820060.

The previous prime is 25719896820053. The next prime is 25719896820193. The reversal of 25719896820061 is 16002869891752.

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., 25592529916836 + 127366903225 = 5058906^2 + 356885^2 .

It is a cyclic number.

It is not a de Polignac number, because 25719896820061 - 2³ = 25719896820053 is a prime.

It is a super-3 number, since 3×25719896820061³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25719896819975 and 25719896820002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25719896829061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859948410030 + 12859948410031.

It is an arithmetic number, because the mean of its divisors is an integer number (12859948410031).

Almost surely, 2^{25719896820061} is an apocalyptic number.

It is an amenable number.

25719896820061 is a deficient number, since it is larger than the sum of its proper divisors (1).

25719896820061 is an equidigital number, since it uses as much as digits as its factorization.

25719896820061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 25719896820061 in words is "twenty-five trillion, seven hundred nineteen billion, eight hundred ninety-six million, eight hundred twenty thousand, sixty-one".