1642663752668 has 24 divisors (see below), whose sum is σ = 2879034931584. Its totient is φ = 820083147200.

The previous prime is 1642663752607. The next prime is 1642663752671. The reversal of 1642663752668 is 8662573662461.

It is a self number, because there is not a number n which added to its sum of digits gives 1642663752668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8208278 + ... + 8406018.

It is an arithmetic number, because the mean of its divisors is an integer number (119959788816).

Almost surely, 2^{1642663752668} is an apocalyptic number.

It is an amenable number.

1642663752668 is a deficient number, since it is larger than the sum of its proper divisors (1236371178916).

1642663752668 is a wasteful number, since it uses less digits than its factorization.

1642663752668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200893 (or 200891 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 62.

The spelling of 1642663752668 in words is "one trillion, six hundred forty-two billion, six hundred sixty-three million, seven hundred fifty-two thousand, six hundred sixty-eight".