385661166583 has 16 divisors (see below), whose sum is σ = 496334776320. Its totient is φ = 290821154400.

The previous prime is 385661166563. The next prime is 385661166623.

385661166583 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 385661166583 - 2²¹ = 385659069431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385661166533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80781268 + ... + 80786041.

It is an arithmetic number, because the mean of its divisors is an integer number (31020923520).

Almost surely, 2^385661166583 is an apocalyptic number.

385661166583 is a deficient number, since it is larger than the sum of its proper divisors (110673609737).

385661166583 is a wasteful number, since it uses less digits than its factorization.

385661166583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161567358.

The product of its digits is 18662400, while the sum is 58.

The spelling of 385661166583 in words is "three hundred eighty-five billion, six hundred sixty-one million, one hundred sixty-six thousand, five hundred eighty-three".