25346380621993 has 2 divisors, whose sum is σ = 25346380621994. Its totient is φ = 25346380621992.

The previous prime is 25346380621967. The next prime is 25346380622029. The reversal of 25346380621993 is 39912608364352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15511207234329 + 9835173387664 = 3938427^2 + 3136108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25346380621993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25346380622993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12673190310996 + 12673190310997.

It is an arithmetic number, because the mean of its divisors is an integer number (12673190310997).

Almost surely, 2^{25346380621993} is an apocalyptic number.

It is an amenable number.

25346380621993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25346380621993 is an equidigital number, since it uses as much as digits as its factorization.

25346380621993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50388480, while the sum is 61.

The spelling of 25346380621993 in words is "twenty-five trillion, three hundred forty-six billion, three hundred eighty million, six hundred twenty-one thousand, nine hundred ninety-three".