642164216948 has 12 divisors (see below), whose sum is σ = 1123794245280. Its totient is φ = 321080146872.

The previous prime is 642164216879. The next prime is 642164216963. The reversal of 642164216948 is 849612461246.

It is a self number, because there is not a number n which added to its sum of digits gives 642164216948.

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 3 ways as a sum of consecutive naturals, for example, 443993 + ... + 1217151.

It is an arithmetic number, because the mean of its divisors is an integer number (93649520440).

Almost surely, 2^642164216948 is an apocalyptic number.

It is an amenable number.

642164216948 is a deficient number, since it is larger than the sum of its proper divisors (481630028332).

642164216948 is a wasteful number, since it uses less digits than its factorization.

642164216948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980806 (or 980804 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 53.

The spelling of 642164216948 in words is "six hundred forty-two billion, one hundred sixty-four million, two hundred sixteen thousand, nine hundred forty-eight".