381505117867 has 2 divisors, whose sum is σ = 381505117868. Its totient is φ = 381505117866.

The previous prime is 381505117817. The next prime is 381505117871. The reversal of 381505117867 is 768711505183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381505117867 - 2⁷ = 381505117739 is a prime.

It is not a weakly prime, because it can be changed into another prime (381505117817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190752558933 + 190752558934.

It is an arithmetic number, because the mean of its divisors is an integer number (190752558934).

Almost surely, 2^381505117867 is an apocalyptic number.

381505117867 is a deficient number, since it is larger than the sum of its proper divisors (1).

381505117867 is an equidigital number, since it uses as much as digits as its factorization.

381505117867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 381505117867 in words is "three hundred eighty-one billion, five hundred five million, one hundred seventeen thousand, eight hundred sixty-seven".