642692733993 has 12 divisors (see below), whose sum is σ = 949923111280. Its totient is φ = 418497593976.

The previous prime is 642692733989. The next prime is 642692734003. The reversal of 642692733993 is 399337296246.

642692733993 is a `hidden beast` number, since 6 + 426 + 92 + 7 + 3 + 39 + 93 = 666.

642692733993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642692733993 - 2² = 642692733989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642692733993.

It is not an unprimeable number, because it can be changed into a prime (642692733923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 830351983 + ... + 830352756.

Almost surely, 2^642692733993 is an apocalyptic number.

It is an amenable number.

642692733993 is a deficient number, since it is larger than the sum of its proper divisors (307230377287).

642692733993 is a wasteful number, since it uses less digits than its factorization.

642692733993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660704788 (or 1660704785 counting only the distinct ones).

The product of its digits is 79361856, while the sum is 63.

The spelling of 642692733993 in words is "six hundred forty-two billion, six hundred ninety-two million, seven hundred thirty-three thousand, nine hundred ninety-three".