39868869646 has 8 divisors (see below), whose sum is σ = 59890866264. Its totient is φ = 19905247560.

The previous prime is 39868869611. The next prime is 39868869707. The reversal of 39868869646 is 64696886893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14591925 + ... + 14594656.

It is an arithmetic number, because the mean of its divisors is an integer number (7486358283).

Almost surely, 2^39868869646 is an apocalyptic number.

39868869646 is a deficient number, since it is larger than the sum of its proper divisors (20021996618).

39868869646 is a wasteful number, since it uses less digits than its factorization.

39868869646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29187266.

The product of its digits is 644972544, while the sum is 73.

The spelling of 39868869646 in words is "thirty-nine billion, eight hundred sixty-eight million, eight hundred sixty-nine thousand, six hundred forty-six".