381450661583 has 2 divisors, whose sum is σ = 381450661584. Its totient is φ = 381450661582.

The previous prime is 381450661567. The next prime is 381450661633. The reversal of 381450661583 is 385166054183.

It is an a-pointer prime, because the next prime (381450661633) can be obtained adding 381450661583 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381450661583 - 2⁴ = 381450661567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381450651583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190725330791 + 190725330792.

It is an arithmetic number, because the mean of its divisors is an integer number (190725330792).

Almost surely, 2^381450661583 is an apocalyptic number.

381450661583 is a deficient number, since it is larger than the sum of its proper divisors (1).

381450661583 is an equidigital number, since it uses as much as digits as its factorization.

381450661583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 381450661583 in words is "three hundred eighty-one billion, four hundred fifty million, six hundred sixty-one thousand, five hundred eighty-three".