39885086709 has 12 divisors (see below), whose sum is σ = 62043468396. Its totient is φ = 24544668672.

The previous prime is 39885086687. The next prime is 39885086719. The reversal of 39885086709 is 90768058893.

It can be written as a sum of positive squares in 2 ways, for example, as 7105984209 + 32779102500 = 84297^2 + 181050^2 .

It is not a de Polignac number, because 39885086709 - 2¹⁵ = 39885053941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39885086719) 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, 170448972 + ... + 170449205.

It is an arithmetic number, because the mean of its divisors is an integer number (5170289033).

Almost surely, 2^39885086709 is an apocalyptic number.

39885086709 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

39885086709 is a deficient number, since it is larger than the sum of its proper divisors (22158381687).

39885086709 is a wasteful number, since it uses less digits than its factorization.

39885086709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340898196 (or 340898193 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 39885086709 in words is "thirty-nine billion, eight hundred eighty-five million, eighty-six thousand, seven hundred nine".