1399660831618 has 32 divisors (see below), whose sum is σ = 2557012230144. Its totient is φ = 561566041872.

The previous prime is 1399660831609. The next prime is 1399660831631. The reversal of 1399660831618 is 8161380669931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46227130 + ... + 46257397.

It is an arithmetic number, because the mean of its divisors is an integer number (79906632192).

Almost surely, 2^{1399660831618} is an apocalyptic number.

1399660831618 is a deficient number, since it is larger than the sum of its proper divisors (1157351398526).

1399660831618 is a wasteful number, since it uses less digits than its factorization.

1399660831618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92484606.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The spelling of 1399660831618 in words is "one trillion, three hundred ninety-nine billion, six hundred sixty million, eight hundred thirty-one thousand, six hundred eighteen".