642768766143 has 16 divisors (see below), whose sum is σ = 992874391296. Its totient is φ = 362264978880.

The previous prime is 642768766141. The next prime is 642768766151. The reversal of 642768766143 is 341667867246.

It is not a de Polignac number, because 642768766143 - 2¹ = 642768766141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642768766141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209642553 + ... + 209645618.

It is an arithmetic number, because the mean of its divisors is an integer number (62054649456).

Almost surely, 2^642768766143 is an apocalyptic number.

642768766143 is a deficient number, since it is larger than the sum of its proper divisors (350105625153).

642768766143 is a wasteful number, since it uses less digits than its factorization.

642768766143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419288254.

The product of its digits is 48771072, while the sum is 60.

The spelling of 642768766143 in words is "six hundred forty-two billion, seven hundred sixty-eight million, seven hundred sixty-six thousand, one hundred forty-three".