642163269 has 16 divisors (see below), whose sum is σ = 966265920. Its totient is φ = 375768960.

The previous prime is 642163241. The next prime is 642163297. The reversal of 642163269 is 962361246.

It is an interprime number because it is at equal distance from previous prime (642163241) and next prime (642163297).

It is not a de Polignac number, because 642163269 - 2⁵ = 642163237 is a prime.

It is a super-2 number, since 2×642163269² = 824747328105532722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642163969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334552 + ... + 336465.

It is an arithmetic number, because the mean of its divisors is an integer number (60391620).

Almost surely, 2^642163269 is an apocalyptic number.

It is an amenable number.

642163269 is a deficient number, since it is larger than the sum of its proper divisors (324102651).

642163269 is a wasteful number, since it uses less digits than its factorization.

642163269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671060.

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

The square root of 642163269 is about 25340.9405705471. The cubic root of 642163269 is about 862.7437469464.

The spelling of 642163269 in words is "six hundred forty-two million, one hundred sixty-three thousand, two hundred sixty-nine".