138661847344746 has 48 divisors (see below), whose sum is σ = 328524679330848. Its totient is φ = 41918934607200.

The previous prime is 138661847344729. The next prime is 138661847344807. The reversal of 138661847344746 is 647443748166831.

138661847344746 is a `hidden beast` number, since 1 + 3 + 8 + 6 + 6 + 1 + 84 + 73 + 4 + 474 + 6 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 831641536 + ... + 831808251.

It is an arithmetic number, because the mean of its divisors is an integer number (6844264152726).

Almost surely, 2^{138661847344746} is an apocalyptic number.

138661847344746 is an abundant number, since it is smaller than the sum of its proper divisors (189862831986102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138661847344746 is a wasteful number, since it uses less digits than its factorization.

138661847344746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663450227 (or 1663450224 counting only the distinct ones).

The product of its digits is 1560674304, while the sum is 72.

The spelling of 138661847344746 in words is "one hundred thirty-eight trillion, six hundred sixty-one billion, eight hundred forty-seven million, three hundred forty-four thousand, seven hundred forty-six".