39857834506 has 12 divisors (see below), whose sum is σ = 69547854258. Its totient is φ = 17081929032.

The previous prime is 39857834479. The next prime is 39857834531. The reversal of 39857834506 is 60543875893.

It can be written as a sum of positive squares in only one way, i.e., 39279672481 + 578162025 = 198191^2 + 24045^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203356201 + ... + 203356396.

Almost surely, 2^39857834506 is an apocalyptic number.

39857834506 is a deficient number, since it is larger than the sum of its proper divisors (29690019752).

39857834506 is a wasteful number, since it uses less digits than its factorization.

39857834506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406712613 (or 406712606 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 39857834506 in words is "thirty-nine billion, eight hundred fifty-seven million, eight hundred thirty-four thousand, five hundred six".