39447274493 has 18 divisors (see below), whose sum is σ = 45326630622. Its totient is φ = 34301922160.

The previous prime is 39447274481. The next prime is 39447274543.

39447274493 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 29510773369 + 9936501124 = 171787^2 + 99682^2 .

It is not a de Polignac number, because 39447274493 - 2¹² = 39447270397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39447274463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 244130 + ... + 372147.

Almost surely, 2^39447274493 is an apocalyptic number.

It is an amenable number.

39447274493 is a deficient number, since it is larger than the sum of its proper divisors (5879356129).

39447274493 is a wasteful number, since it uses less digits than its factorization.

39447274493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616345 (or 616311 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 56.

The spelling of 39447274493 in words is "thirty-nine billion, four hundred forty-seven million, two hundred seventy-four thousand, four hundred ninety-three".