1138684641478 has 16 divisors (see below), whose sum is σ = 1728647562096. Its totient is φ = 562469120640.

The previous prime is 1138684641443. The next prime is 1138684641487. The reversal of 1138684641478 is 8741464868311.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12364450 + ... + 12456202.

It is an arithmetic number, because the mean of its divisors is an integer number (108040472631).

Almost surely, 2^{1138684641478} is an apocalyptic number.

1138684641478 is a deficient number, since it is larger than the sum of its proper divisors (589962920618).

1138684641478 is an equidigital number, since it uses as much as digits as its factorization.

1138684641478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166599.

The product of its digits is 24772608, while the sum is 61.

The spelling of 1138684641478 in words is "one trillion, one hundred thirty-eight billion, six hundred eighty-four million, six hundred forty-one thousand, four hundred seventy-eight".