39699619418 has 4 divisors (see below), whose sum is σ = 59549429130. Its totient is φ = 19849809708.

The previous prime is 39699619417. The next prime is 39699619423. The reversal of 39699619418 is 81491699693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81491699693 = 1789 ⋅45551537.

It can be written as a sum of positive squares in only one way, i.e., 39689803729 + 9815689 = 199223^2 + 3133^2 .

It is not an unprimeable number, because it can be changed into a prime (39699619417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9924904853 + ... + 9924904856.

Almost surely, 2^39699619418 is an apocalyptic number.

39699619418 is a deficient number, since it is larger than the sum of its proper divisors (19849809712).

39699619418 is a wasteful number, since it uses less digits than its factorization.

39699619418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19849809711.

The product of its digits is 22674816, while the sum is 65.

The spelling of 39699619418 in words is "thirty-nine billion, six hundred ninety-nine million, six hundred nineteen thousand, four hundred eighteen".