642159579 has 8 divisors (see below), whose sum is σ = 856337472. Its totient is φ = 428044040.

The previous prime is 642159559. The next prime is 642159593. The reversal of 642159579 is 975951246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642159579 - 2¹¹ = 642157531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642159509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20152 + ... + 41114.

It is an arithmetic number, because the mean of its divisors is an integer number (107042184).

Almost surely, 2^642159579 is an apocalyptic number.

642159579 is a deficient number, since it is larger than the sum of its proper divisors (214177893).

642159579 is a wasteful number, since it uses less digits than its factorization.

642159579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31177.

The product of its digits is 680400, while the sum is 48.

The square root of 642159579 is about 25340.8677633581. The cubic root of 642159579 is about 862.7420944432.

The spelling of 642159579 in words is "six hundred forty-two million, one hundred fifty-nine thousand, five hundred seventy-nine".