642320162 has 16 divisors (see below), whose sum is σ = 1053523584. Its totient is φ = 291282000.

The previous prime is 642320143. The next prime is 642320171. The reversal of 642320162 is 261023246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24389 + ... + 43352.

It is an arithmetic number, because the mean of its divisors is an integer number (65845224).

Almost surely, 2^642320162 is an apocalyptic number.

642320162 is a deficient number, since it is larger than the sum of its proper divisors (411203422).

642320162 is a wasteful number, since it uses less digits than its factorization.

642320162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68185.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 642320162 is about 25344.0360242800. The cubic root of 642320162 is about 862.8140029281.

The spelling of 642320162 in words is "six hundred forty-two million, three hundred twenty thousand, one hundred sixty-two".