642146641246 has 32 divisors (see below), whose sum is σ = 1112715841248. Its totient is φ = 274685629440.

The previous prime is 642146641223. The next prime is 642146641271.

642146641246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642146641196 and 642146641205.

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 15 ways as a sum of consecutive naturals, for example, 3590236 + ... + 3764848.

It is an arithmetic number, because the mean of its divisors is an integer number (34772370039).

Almost surely, 2^642146641246 is an apocalyptic number.

642146641246 is a deficient number, since it is larger than the sum of its proper divisors (470569200002).

642146641246 is a wasteful number, since it uses less digits than its factorization.

642146641246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184476.

The product of its digits is 1327104, while the sum is 46.

The spelling of 642146641246 in words is "six hundred forty-two billion, one hundred forty-six million, six hundred forty-one thousand, two hundred forty-six".