642523503364 has 6 divisors (see below), whose sum is σ = 1124416130894. Its totient is φ = 321261751680.

The previous prime is 642523503353. The next prime is 642523503397. The reversal of 642523503364 is 463305325246.

It can be written as a sum of positive squares in only one way, i.e., 446798664900 + 195724838464 = 668430^2 + 442408^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 642523503364.

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 as a sum of consecutive naturals, namely, 80315437917 + ... + 80315437924.

Almost surely, 2^642523503364 is an apocalyptic number.

It is an amenable number.

642523503364 is a deficient number, since it is larger than the sum of its proper divisors (481892627530).

642523503364 is a wasteful number, since it uses less digits than its factorization.

642523503364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160630875845 (or 160630875843 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 43.

The spelling of 642523503364 in words is "six hundred forty-two billion, five hundred twenty-three million, five hundred three thousand, three hundred sixty-four".