642103632 has 80 divisors (see below), whose sum is σ = 1940104000. Its totient is φ = 202766976.

The previous prime is 642103619. The next prime is 642103633. The reversal of 642103632 is 236301246.

642103632 is a `hidden beast` number, since 6 + 4 + 21 + 0 + 3 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 642103596 and 642103605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642103633) 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 15 ways as a sum of consecutive naturals, for example, 30907 + ... + 47322.

It is an arithmetic number, because the mean of its divisors is an integer number (24251300).

Almost surely, 2^642103632 is an apocalyptic number.

It is an amenable number.

642103632 is an abundant number, since it is smaller than the sum of its proper divisors (1298000368).

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

642103632 is a wasteful number, since it uses less digits than its factorization.

642103632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78265 (or 78253 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 642103632 is about 25339.7638505176. The cubic root of 642103632 is about 862.7170387637.

Adding to 642103632 its reverse (236301246), we get a palindrome (878404878).

The spelling of 642103632 in words is "six hundred forty-two million, one hundred three thousand, six hundred thirty-two".