138731885074 has 32 divisors (see below), whose sum is σ = 233496270000. Its totient is φ = 61496924160.

The previous prime is 138731885063. The next prime is 138731885077. The reversal of 138731885074 is 470588137831.

It can be written as a sum of positive squares in 8 ways, for example, as 82882379449 + 55849505625 = 287893^2 + 236325^2 .

It is not an unprimeable number, because it can be changed into a prime (138731885077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1675449 + ... + 1756300.

Almost surely, 2^138731885074 is an apocalyptic number.

138731885074 is a deficient number, since it is larger than the sum of its proper divisors (94764384926).

138731885074 is a wasteful number, since it uses less digits than its factorization.

138731885074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431838.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 138731885074 in words is "one hundred thirty-eight billion, seven hundred thirty-one million, eight hundred eighty-five thousand, seventy-four".