1638373433612 has 48 divisors (see below), whose sum is σ = 2884048742400. Its totient is φ = 814378924800.

The previous prime is 1638373433579. The next prime is 1638373433639. The reversal of 1638373433612 is 2163343738361.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871938089 + ... + 871939967.

It is an arithmetic number, because the mean of its divisors is an integer number (60084348800).

Almost surely, 2^{1638373433612} is an apocalyptic number.

It is an amenable number.

1638373433612 is a deficient number, since it is larger than the sum of its proper divisors (1245675308788).

1638373433612 is a wasteful number, since it uses less digits than its factorization.

1638373433612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846 (or 3844 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 50.

The spelling of 1638373433612 in words is "one trillion, six hundred thirty-eight billion, three hundred seventy-three million, four hundred thirty-three thousand, six hundred twelve".