381249664618 has 16 divisors (see below), whose sum is σ = 621391645440. Its totient is φ = 174766399200.

The previous prime is 381249664591. The next prime is 381249664619. The reversal of 381249664618 is 816466942183.

It is not an unprimeable number, because it can be changed into a prime (381249664619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161819563 + ... + 161821918.

It is an arithmetic number, because the mean of its divisors is an integer number (38836977840).

Almost surely, 2^381249664618 is an apocalyptic number.

381249664618 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

381249664618 is a deficient number, since it is larger than the sum of its proper divisors (240141980822).

381249664618 is a wasteful number, since it uses less digits than its factorization.

381249664618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323641533.

The product of its digits is 11943936, while the sum is 58.

The spelling of 381249664618 in words is "three hundred eighty-one billion, two hundred forty-nine million, six hundred sixty-four thousand, six hundred eighteen".