83716121338 has 16 divisors (see below), whose sum is σ = 132113646504. Its totient is φ = 39733424640.

The previous prime is 83716121329. The next prime is 83716121339. The reversal of 83716121338 is 83312161738.

It can be written as a sum of positive squares in 4 ways, for example, as 60335570689 + 23380550649 = 245633^2 + 152907^2 .

It is a junction number, because it is equal to n+sod(n) for n = 83716121294 and 83716121303.

It is not an unprimeable number, because it can be changed into a prime (83716121339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13793295 + ... + 13799362.

Almost surely, 2^83716121338 is an apocalyptic number.

83716121338 is a deficient number, since it is larger than the sum of its proper divisors (48397525166).

83716121338 is a wasteful number, since it uses less digits than its factorization.

83716121338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27592737.

The product of its digits is 145152, while the sum is 43.

The spelling of 83716121338 in words is "eighty-three billion, seven hundred sixteen million, one hundred twenty-one thousand, three hundred thirty-eight".