642760942763 has 4 divisors (see below), whose sum is σ = 642770317368. Its totient is φ = 642751568160.

The previous prime is 642760942709. The next prime is 642760942841. The reversal of 642760942763 is 367249067246.

642760942763 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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642760942763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642760942699 and 642760942708.

It is not an unprimeable number, because it can be changed into a prime (642760942063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4583693 + ... + 4721838.

It is an arithmetic number, because the mean of its divisors is an integer number (160692579342).

Almost surely, 2^642760942763 is an apocalyptic number.

642760942763 is a deficient number, since it is larger than the sum of its proper divisors (9374605).

642760942763 is an equidigital number, since it uses as much as digits as its factorization.

642760942763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9374604.

The product of its (nonzero) digits is 18289152, while the sum is 56.

The spelling of 642760942763 in words is "six hundred forty-two billion, seven hundred sixty million, nine hundred forty-two thousand, seven hundred sixty-three".