642653260 has 24 divisors (see below), whose sum is σ = 1352506176. Its totient is φ = 256502400.

The previous prime is 642653243. The next prime is 642653267. The reversal of 642653260 is 62356246.

It is not an unprimeable number, because it can be changed into a prime (642653267) 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 7 ways as a sum of consecutive naturals, for example, 25441 + ... + 43960.

It is an arithmetic number, because the mean of its divisors is an integer number (56354424).

Almost surely, 2^642653260 is an apocalyptic number.

It is an amenable number.

642653260 is an abundant number, since it is smaller than the sum of its proper divisors (709852916).

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

642653260 is a wasteful number, since it uses less digits than its factorization.

642653260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69873 (or 69871 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 642653260 is about 25350.6066988544. The cubic root of 642653260 is about 862.9631247987.

The spelling of 642653260 in words is "six hundred forty-two million, six hundred fifty-three thousand, two hundred sixty".