381806659585 has 32 divisors (see below), whose sum is σ = 504153740160. Its totient is φ = 275856537600.

The previous prime is 381806659579. The next prime is 381806659613. The reversal of 381806659585 is 585956608183.

It is not a de Polignac number, because 381806659585 - 2⁷ = 381806659457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573265 + ... + 1045105.

It is an arithmetic number, because the mean of its divisors is an integer number (15754804380).

Almost surely, 2^381806659585 is an apocalyptic number.

It is an amenable number.

381806659585 is a deficient number, since it is larger than the sum of its proper divisors (122347080575).

381806659585 is a wasteful number, since it uses less digits than its factorization.

381806659585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472129.

The product of its (nonzero) digits is 62208000, while the sum is 64.

The spelling of 381806659585 in words is "three hundred eighty-one billion, eight hundred six million, six hundred fifty-nine thousand, five hundred eighty-five".