646523941942 has 4 divisors (see below), whose sum is σ = 969785912916. Its totient is φ = 323261970970.

The previous prime is 646523941933. The next prime is 646523942017. The reversal of 646523941942 is 249149325646.

646523941942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161630985484 + ... + 161630985487.

It is an arithmetic number, because the mean of its divisors is an integer number (242446478229).

Almost surely, 2^646523941942 is an apocalyptic number.

646523941942 is a deficient number, since it is larger than the sum of its proper divisors (323261970974).

646523941942 is a wasteful number, since it uses less digits than its factorization.

646523941942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323261970973.

The product of its digits is 11197440, while the sum is 55.

The spelling of 646523941942 in words is "six hundred forty-six billion, five hundred twenty-three million, nine hundred forty-one thousand, nine hundred forty-two".