381874394641 has 2 divisors, whose sum is σ = 381874394642. Its totient is φ = 381874394640.

The previous prime is 381874394609. The next prime is 381874394689. The reversal of 381874394641 is 146493478183.

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., 285652836225 + 96221558416 = 534465^2 + 310196^2 .

It is a cyclic number.

It is not a de Polignac number, because 381874394641 - 2⁵ = 381874394609 is a prime.

It is not a weakly prime, because it can be changed into another prime (381874391641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190937197320 + 190937197321.

It is an arithmetic number, because the mean of its divisors is an integer number (190937197321).

Almost surely, 2^381874394641 is an apocalyptic number.

It is an amenable number.

381874394641 is a deficient number, since it is larger than the sum of its proper divisors (1).

381874394641 is an equidigital number, since it uses as much as digits as its factorization.

381874394641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 58.

The spelling of 381874394641 in words is "three hundred eighty-one billion, eight hundred seventy-four million, three hundred ninety-four thousand, six hundred forty-one".