138261558701872 has 40 divisors (see below), whose sum is σ = 283829501579616. Its totient is φ = 65020683181056.

The previous prime is 138261558701831. The next prime is 138261558701897. The reversal of 138261558701872 is 278107855162831.

It is a super-2 number, since 2×138261558701872² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169826508 + ... + 170638699.

Almost surely, 2^{138261558701872} is an apocalyptic number.

It is an amenable number.

138261558701872 is an abundant number, since it is smaller than the sum of its proper divisors (145567942877744).

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

138261558701872 is a wasteful number, since it uses less digits than its factorization.

138261558701872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340466725 (or 340466719 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 64.

The spelling of 138261558701872 in words is "one hundred thirty-eight trillion, two hundred sixty-one billion, five hundred fifty-eight million, seven hundred one thousand, eight hundred seventy-two".