25194865933 has 2 divisors, whose sum is σ = 25194865934. Its totient is φ = 25194865932.

The previous prime is 25194865903. The next prime is 25194865981. The reversal of 25194865933 is 33956849152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25070922244 + 123943689 = 158338^2 + 11133^2 .

It is a cyclic number.

It is not a de Polignac number, because 25194865933 - 2⁵ = 25194865901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25194865903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597432966 + 12597432967.

It is an arithmetic number, because the mean of its divisors is an integer number (12597432967).

Almost surely, 2^25194865933 is an apocalyptic number.

It is an amenable number.

25194865933 is a deficient number, since it is larger than the sum of its proper divisors (1).

25194865933 is an equidigital number, since it uses as much as digits as its factorization.

25194865933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6998400, while the sum is 55.

The spelling of 25194865933 in words is "twenty-five billion, one hundred ninety-four million, eight hundred sixty-five thousand, nine hundred thirty-three".