642206264 has 16 divisors (see below), whose sum is σ = 1376156400. Its totient is φ = 275231232.

The previous prime is 642206237. The next prime is 642206267. The reversal of 642206264 is 462602246.

It is a self number, because there is not a number n which added to its sum of digits gives 642206264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642206267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5733929 + ... + 5734040.

It is an arithmetic number, because the mean of its divisors is an integer number (86009775).

Almost surely, 2^642206264 is an apocalyptic number.

It is an amenable number.

642206264 is an abundant number, since it is smaller than the sum of its proper divisors (733950136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642206264 is a wasteful number, since it uses less digits than its factorization.

642206264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11467982 (or 11467978 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 642206264 is about 25341.7888871327. The cubic root of 642206264 is about 862.7630010527.

The spelling of 642206264 in words is "six hundred forty-two million, two hundred six thousand, two hundred sixty-four".