642237732246 has 32 divisors (see below), whose sum is σ = 1402869777408. Its totient is φ = 194391964640.

The previous prime is 642237732223. The next prime is 642237732263.

It is a happy number.

642237732246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642237732195 and 642237732204.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5580861 + ... + 5694776.

It is an arithmetic number, because the mean of its divisors is an integer number (43839680544).

Almost surely, 2^642237732246 is an apocalyptic number.

642237732246 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

642237732246 is an abundant number, since it is smaller than the sum of its proper divisors (760632045162).

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

642237732246 is a wasteful number, since it uses less digits than its factorization.

642237732246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11276516.

The product of its digits is 4064256, while the sum is 48.

The spelling of 642237732246 in words is "six hundred forty-two billion, two hundred thirty-seven million, seven hundred thirty-two thousand, two hundred forty-six".