642514732423 has 2 divisors, whose sum is σ = 642514732424. Its totient is φ = 642514732422.

The previous prime is 642514732411. The next prime is 642514732459. The reversal of 642514732423 is 324237415246.

642514732423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642514732423 is a prime.

It is a super-3 number, since 3×642514732423³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642514732423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642514732723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321257366211 + 321257366212.

It is an arithmetic number, because the mean of its divisors is an integer number (321257366212).

Almost surely, 2^642514732423 is an apocalyptic number.

642514732423 is a deficient number, since it is larger than the sum of its proper divisors (1).

642514732423 is an equidigital number, since it uses as much as digits as its factorization.

642514732423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 43.

The spelling of 642514732423 in words is "six hundred forty-two billion, five hundred fourteen million, seven hundred thirty-two thousand, four hundred twenty-three".