642763067627 has 4 divisors (see below), whose sum is σ = 645152521680. Its totient is φ = 640373613576.

The previous prime is 642763067623. The next prime is 642763067719. The reversal of 642763067627 is 726760367246.

642763067627 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 not a de Polignac number, because 642763067627 - 2² = 642763067623 is a prime.

It is a super-2 number, since 2×642763067627² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642763067623) 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, 1194726623 + ... + 1194727160.

It is an arithmetic number, because the mean of its divisors is an integer number (161288130420).

Almost surely, 2^642763067627 is an apocalyptic number.

642763067627 is a deficient number, since it is larger than the sum of its proper divisors (2389454053).

642763067627 is a wasteful number, since it uses less digits than its factorization.

642763067627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389454052.

The product of its (nonzero) digits is 21337344, while the sum is 56.

The spelling of 642763067627 in words is "six hundred forty-two billion, seven hundred sixty-three million, sixty-seven thousand, six hundred twenty-seven".