25961357952043 has 2 divisors, whose sum is σ = 25961357952044. Its totient is φ = 25961357952042.

The previous prime is 25961357951983. The next prime is 25961357952067. The reversal of 25961357952043 is 34025975316952.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25961357952043 is a prime.

It is a super-2 number, since 2×25961357952043² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25961357952143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12980678976021 + 12980678976022.

It is an arithmetic number, because the mean of its divisors is an integer number (12980678976022).

Almost surely, 2^{25961357952043} is an apocalyptic number.

25961357952043 is a deficient number, since it is larger than the sum of its proper divisors (1).

25961357952043 is an equidigital number, since it uses as much as digits as its factorization.

25961357952043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236000, while the sum is 61.

The spelling of 25961357952043 in words is "twenty-five trillion, nine hundred sixty-one billion, three hundred fifty-seven million, nine hundred fifty-two thousand, forty-three".