642743263159 has 4 divisors (see below), whose sum is σ = 642758795800. Its totient is φ = 642727730520.

The previous prime is 642743263157. The next prime is 642743263163. The reversal of 642743263159 is 951362347246.

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 642743263159 - 2¹ = 642743263157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642743263157) 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, 7704084 + ... + 7787065.

It is an arithmetic number, because the mean of its divisors is an integer number (160689698950).

Almost surely, 2^642743263159 is an apocalyptic number.

642743263159 is a deficient number, since it is larger than the sum of its proper divisors (15532641).

642743263159 is a wasteful number, since it uses less digits than its factorization.

642743263159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15532640.

The product of its digits is 6531840, while the sum is 52.

The spelling of 642743263159 in words is "six hundred forty-two billion, seven hundred forty-three million, two hundred sixty-three thousand, one hundred fifty-nine".