642404276552 has 48 divisors (see below), whose sum is σ = 1280612702160. Its totient is φ = 302051922176.

The previous prime is 642404276539. The next prime is 642404276557. The reversal of 642404276552 is 255672404246.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 642404276497 and 642404276506.

It is not an unprimeable number, because it can be changed into a prime (642404276557) 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 11 ways as a sum of consecutive naturals, for example, 2627303 + ... + 2861385.

It is an arithmetic number, because the mean of its divisors is an integer number (26679431295).

Almost surely, 2^642404276552 is an apocalyptic number.

It is an amenable number.

642404276552 is a deficient number, since it is larger than the sum of its proper divisors (638208425608).

642404276552 is a wasteful number, since it uses less digits than its factorization.

642404276552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235310 (or 235289 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 47.

The spelling of 642404276552 in words is "six hundred forty-two billion, four hundred four million, two hundred seventy-six thousand, five hundred fifty-two".