642131131246 has 32 divisors (see below), whose sum is σ = 1075867930368. Its totient is φ = 284911851840.

The previous prime is 642131131223. The next prime is 642131131249.

642131131246 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642131131249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309026 + ... + 1731418.

It is an arithmetic number, because the mean of its divisors is an integer number (33620872824).

Almost surely, 2^642131131246 is an apocalyptic number.

642131131246 is a deficient number, since it is larger than the sum of its proper divisors (433736799122).

642131131246 is a wasteful number, since it uses less digits than its factorization.

642131131246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424056.

The product of its digits is 20736, while the sum is 34.

It can be divided in two parts, 642131 and 131246, that added together give a palindrome (773377).

The spelling of 642131131246 in words is "six hundred forty-two billion, one hundred thirty-one million, one hundred thirty-one thousand, two hundred forty-six".