39787105385 has 4 divisors (see below), whose sum is σ = 47744526468. Its totient is φ = 31829684304.

The previous prime is 39787105367. The next prime is 39787105387. The reversal of 39787105385 is 58350178793.

It is a happy number.

39787105385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58350178793 = 7517 ⋅7762429.

It can be written as a sum of positive squares in 2 ways, for example, as 8485357456 + 31301747929 = 92116^2 + 176923^2 .

It is a cyclic number.

It is not a de Polignac number, because 39787105385 - 2¹⁶ = 39787039849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39787105385.

It is not an unprimeable number, because it can be changed into a prime (39787105387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3978710534 + ... + 3978710543.

It is an arithmetic number, because the mean of its divisors is an integer number (11936131617).

Almost surely, 2^39787105385 is an apocalyptic number.

It is an amenable number.

39787105385 is a deficient number, since it is larger than the sum of its proper divisors (7957421083).

39787105385 is an equidigital number, since it uses as much as digits as its factorization.

39787105385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7957421082.

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 39787105385 in words is "thirty-nine billion, seven hundred eighty-seven million, one hundred five thousand, three hundred eighty-five".