642824030550 has 96 divisors (see below), whose sum is σ = 1772216570880. Its totient is φ = 153129283200.

The previous prime is 642824030543. The next prime is 642824030579. The reversal of 642824030550 is 55030428246.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 642824030499 and 642824030508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5256540 + ... + 5377439.

It is an arithmetic number, because the mean of its divisors is an integer number (18460589280).

Almost surely, 2^642824030550 is an apocalyptic number.

642824030550 is an abundant number, since it is smaller than the sum of its proper divisors (1129392540330).

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

642824030550 is a wasteful number, since it uses less digits than its factorization.

642824030550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10634038 (or 10634033 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 642824030550 its reverse (55030428246), we get a palindrome (697854458796).

The spelling of 642824030550 in words is "six hundred forty-two billion, eight hundred twenty-four million, thirty thousand, five hundred fifty".