39946864899550 has 48 divisors (see below), whose sum is σ = 84999780335520. Its totient is φ = 13682493941760.

The previous prime is 39946864899523. The next prime is 39946864899563. The reversal of 39946864899550 is 5599846864993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56204779 + ... + 56911078.

It is an arithmetic number, because the mean of its divisors is an integer number (1770828756990).

Almost surely, 2^{39946864899550} is an apocalyptic number.

39946864899550 is an abundant number, since it is smaller than the sum of its proper divisors (45052915435970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39946864899550 is a wasteful number, since it uses less digits than its factorization.

39946864899550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113116885 (or 113116880 counting only the distinct ones).

The product of its (nonzero) digits is 18139852800, while the sum is 85.

The spelling of 39946864899550 in words is "thirty-nine trillion, nine hundred forty-six billion, eight hundred sixty-four million, eight hundred ninety-nine thousand, five hundred fifty".