138670141738 has 4 divisors (see below), whose sum is σ = 208005212610. Its totient is φ = 69335070868.

The previous prime is 138670141721. The next prime is 138670141787. The reversal of 138670141738 is 837141076831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138002591169 + 667550569 = 371487^2 + 25837^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138670141691 and 138670141700.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34667535433 + ... + 34667535436.

Almost surely, 2^138670141738 is an apocalyptic number.

138670141738 is a deficient number, since it is larger than the sum of its proper divisors (69335070872).

138670141738 is an equidigital number, since it uses as much as digits as its factorization.

138670141738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69335070871.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 138670141738 in words is "one hundred thirty-eight billion, six hundred seventy million, one hundred forty-one thousand, seven hundred thirty-eight".