381445954193 has 2 divisors, whose sum is σ = 381445954194. Its totient is φ = 381445954192.

The previous prime is 381445954177. The next prime is 381445954213. The reversal of 381445954193 is 391459544183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207250741504 + 174195212689 = 455248^2 + 417367^2 .

It is a cyclic number.

It is not a de Polignac number, because 381445954193 - 2⁴ = 381445954177 is a prime.

It is not a weakly prime, because it can be changed into another prime (381445954103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190722977096 + 190722977097.

It is an arithmetic number, because the mean of its divisors is an integer number (190722977097).

Almost surely, 2^381445954193 is an apocalyptic number.

It is an amenable number.

381445954193 is a deficient number, since it is larger than the sum of its proper divisors (1).

381445954193 is an equidigital number, since it uses as much as digits as its factorization.

381445954193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9331200, while the sum is 56.

The spelling of 381445954193 in words is "three hundred eighty-one billion, four hundred forty-five million, nine hundred fifty-four thousand, one hundred ninety-three".