138804038688646 has 8 divisors (see below), whose sum is σ = 209603414127600. Its totient is φ = 68936233979448.

The previous prime is 138804038688599. The next prime is 138804038688671. The reversal of 138804038688646 is 646886830408831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138804038688646² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232892682066 + ... + 232892682661.

It is an arithmetic number, because the mean of its divisors is an integer number (26200426765950).

Almost surely, 2^{138804038688646} is an apocalyptic number.

138804038688646 is a deficient number, since it is larger than the sum of its proper divisors (70799375438954).

138804038688646 is a wasteful number, since it uses less digits than its factorization.

138804038688646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465785364878.

The product of its (nonzero) digits is 1019215872, while the sum is 73.

The spelling of 138804038688646 in words is "one hundred thirty-eight trillion, eight hundred four billion, thirty-eight million, six hundred eighty-eight thousand, six hundred forty-six".