39955435894 has 24 divisors (see below), whose sum is σ = 66164701680. Its totient is φ = 18082228560.

The previous prime is 39955435867. The next prime is 39955435909. The reversal of 39955435894 is 49853455993.

39955435894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305074 + ... + 415909.

It is an arithmetic number, because the mean of its divisors is an integer number (2756862570).

Almost surely, 2^39955435894 is an apocalyptic number.

39955435894 is a deficient number, since it is larger than the sum of its proper divisors (26209265786).

39955435894 is a wasteful number, since it uses less digits than its factorization.

39955435894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721236 (or 721225 counting only the distinct ones).

The product of its digits is 104976000, while the sum is 64.

The spelling of 39955435894 in words is "thirty-nine billion, nine hundred fifty-five million, four hundred thirty-five thousand, eight hundred ninety-four".