194963620513 has 2 divisors, whose sum is σ = 194963620514. Its totient is φ = 194963620512.

The previous prime is 194963620469. The next prime is 194963620529. The reversal of 194963620513 is 315026369491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188453228544 + 6510391969 = 434112^2 + 80687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194963620513 is a prime.

It is not a weakly prime, because it can be changed into another prime (194963620583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97481810256 + 97481810257.

It is an arithmetic number, because the mean of its divisors is an integer number (97481810257).

Almost surely, 2^194963620513 is an apocalyptic number.

It is an amenable number.

194963620513 is a deficient number, since it is larger than the sum of its proper divisors (1).

194963620513 is an equidigital number, since it uses as much as digits as its factorization.

194963620513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 194963620513 in words is "one hundred ninety-four billion, nine hundred sixty-three million, six hundred twenty thousand, five hundred thirteen".