139645736738 has 8 divisors (see below), whose sum is σ = 209516127660. Its totient is φ = 69807027520.

The previous prime is 139645736719. The next prime is 139645736743. The reversal of 139645736738 is 837637546931.

It can be written as a sum of positive squares in 2 ways, for example, as 138892618489 + 753118249 = 372683^2 + 27443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7909403 + ... + 7927038.

Almost surely, 2^139645736738 is an apocalyptic number.

139645736738 is a deficient number, since it is larger than the sum of its proper divisors (69870390922).

139645736738 is a wasteful number, since it uses less digits than its factorization.

139645736738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15840852.

The product of its digits is 68584320, while the sum is 62.

The spelling of 139645736738 in words is "one hundred thirty-nine billion, six hundred forty-five million, seven hundred thirty-six thousand, seven hundred thirty-eight".