39766806139493 has 2 divisors, whose sum is σ = 39766806139494. Its totient is φ = 39766806139492.

The previous prime is 39766806139481. The next prime is 39766806139589. The reversal of 39766806139493 is 39493160866793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32149829886724 + 7616976252769 = 5670082^2 + 2759887^2 .

It is a cyclic number.

It is not a de Polignac number, because 39766806139493 - 2⁴ = 39766806139477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39766806139493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39766806139393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19883403069746 + 19883403069747.

It is an arithmetic number, because the mean of its divisors is an integer number (19883403069747).

Almost surely, 2^{39766806139493} is an apocalyptic number.

It is an amenable number.

39766806139493 is a deficient number, since it is larger than the sum of its proper divisors (1).

39766806139493 is an equidigital number, since it uses as much as digits as its factorization.

39766806139493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952342272, while the sum is 74.

The spelling of 39766806139493 in words is "thirty-nine trillion, seven hundred sixty-six billion, eight hundred six million, one hundred thirty-nine thousand, four hundred ninety-three".