643242262112 has 12 divisors (see below), whose sum is σ = 1266383203596. Its totient is φ = 321621131040.

The previous prime is 643242262097. The next prime is 643242262123. The reversal of 643242262112 is 211262242346.

643242262112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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, 10050660314 + ... + 10050660377.

It is an arithmetic number, because the mean of its divisors is an integer number (105531933633).

Almost surely, 2^643242262112 is an apocalyptic number.

It is an amenable number.

643242262112 is a deficient number, since it is larger than the sum of its proper divisors (623140941484).

643242262112 is a wasteful number, since it uses less digits than its factorization.

643242262112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101320701 (or 20101320693 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The spelling of 643242262112 in words is "six hundred forty-three billion, two hundred forty-two million, two hundred sixty-two thousand, one hundred twelve".