138531996478112 has 48 divisors (see below), whose sum is σ = 277882766834400. Its totient is φ = 67958613795072.

The previous prime is 138531996478067. The next prime is 138531996478121. The reversal of 138531996478112 is 211874699135831.

It is a super-2 number, since 2×138531996478112² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431130503 + ... + 431451705.

It is an arithmetic number, because the mean of its divisors is an integer number (5789224309050).

Almost surely, 2^{138531996478112} is an apocalyptic number.

It is an amenable number.

138531996478112 is an abundant number, since it is smaller than the sum of its proper divisors (139350770356288).

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

138531996478112 is a wasteful number, since it uses less digits than its factorization.

138531996478112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575565 (or 575557 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 68.

The spelling of 138531996478112 in words is "one hundred thirty-eight trillion, five hundred thirty-one billion, nine hundred ninety-six million, four hundred seventy-eight thousand, one hundred twelve".