642714780031 has 4 divisors (see below), whose sum is σ = 643559346864. Its totient is φ = 641870213200.

The previous prime is 642714780013. The next prime is 642714780077. The reversal of 642714780031 is 130087417246.

642714780031 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, and also an emirpimes, since its reverse is a distinct semiprime: 130087417246 = 2 ⋅65043708623.

It is a cyclic number.

It is not a de Polignac number, because 642714780031 - 2¹⁷ = 642714648959 is a prime.

It is a super-2 number, since 2×642714780031² (a number of 24 digits) contains 22 as substring.

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 642714780031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642714780011) 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, 422282275 + ... + 422283796.

It is an arithmetic number, because the mean of its divisors is an integer number (160889836716).

Almost surely, 2^642714780031 is an apocalyptic number.

642714780031 is a deficient number, since it is larger than the sum of its proper divisors (844566833).

642714780031 is an equidigital number, since it uses as much as digits as its factorization.

642714780031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844566832.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 642714780031 in words is "six hundred forty-two billion, seven hundred fourteen million, seven hundred eighty thousand, thirty-one".