642629163 has 32 divisors (see below), whose sum is σ = 967329792. Its totient is φ = 375955200.

The previous prime is 642629161. The next prime is 642629173. The reversal of 642629163 is 361926246.

It is not a de Polignac number, because 642629163 - 2¹ = 642629161 is a prime.

It is a super-2 number, since 2×642629163² = 825944482276161138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642629161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 749431 + ... + 750287.

It is an arithmetic number, because the mean of its divisors is an integer number (30229056).

Almost surely, 2^642629163 is an apocalyptic number.

642629163 is a deficient number, since it is larger than the sum of its proper divisors (324700629).

642629163 is a wasteful number, since it uses less digits than its factorization.

642629163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635.

The product of its digits is 93312, while the sum is 39.

The square root of 642629163 is about 25350.1314197777. The cubic root of 642629163 is about 862.9523387426.

The spelling of 642629163 in words is "six hundred forty-two million, six hundred twenty-nine thousand, one hundred sixty-three".