25930205993 has 2 divisors, whose sum is σ = 25930205994. Its totient is φ = 25930205992.

The previous prime is 25930205971. The next prime is 25930206079. The reversal of 25930205993 is 39950203952.

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., 25354829824 + 575376169 = 159232^2 + 23987^2 .

It is a cyclic number.

It is not a de Polignac number, because 25930205993 - 2⁶ = 25930205929 is a prime.

It is not a weakly prime, because it can be changed into another prime (25930205963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12965102996 + 12965102997.

It is an arithmetic number, because the mean of its divisors is an integer number (12965102997).

Almost surely, 2^25930205993 is an apocalyptic number.

It is an amenable number.

25930205993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25930205993 is an equidigital number, since it uses as much as digits as its factorization.

25930205993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 656100, while the sum is 47.

The spelling of 25930205993 in words is "twenty-five billion, nine hundred thirty million, two hundred five thousand, nine hundred ninety-three".