39772449693 has 12 divisors (see below), whose sum is σ = 57518404060. Its totient is φ = 26482977216.

The previous prime is 39772449679. The next prime is 39772449733. The reversal of 39772449693 is 39694427793.

39772449693 is a `hidden beast` number, since 39 + 7 + 7 + 24 + 496 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33895387449 + 5877062244 = 184107^2 + 76662^2 .

It is not a de Polignac number, because 39772449693 - 2⁴ = 39772449677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39772449693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39772459693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2657896 + ... + 2672817.

Almost surely, 2^39772449693 is an apocalyptic number.

It is an amenable number.

39772449693 is a deficient number, since it is larger than the sum of its proper divisors (17745954367).

39772449693 is a wasteful number, since it uses less digits than its factorization.

39772449693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331548 (or 5331545 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 63.

The spelling of 39772449693 in words is "thirty-nine billion, seven hundred seventy-two million, four hundred forty-nine thousand, six hundred ninety-three".