5642668420646 has 8 divisors (see below), whose sum is σ = 8490702955680. Its totient is φ = 2812434102088.

The previous prime is 5642668420643. The next prime is 5642668420687. The reversal of 5642668420646 is 6460248662465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5642668420643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4450053326 + ... + 4450054593.

It is an arithmetic number, because the mean of its divisors is an integer number (1061337869460).

Almost surely, 2^{5642668420646} is an apocalyptic number.

5642668420646 is a deficient number, since it is larger than the sum of its proper divisors (2848034535034).

5642668420646 is a wasteful number, since it uses less digits than its factorization.

5642668420646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900108238.

The product of its (nonzero) digits is 79626240, while the sum is 59.

The spelling of 5642668420646 in words is "five trillion, six hundred forty-two billion, six hundred sixty-eight million, four hundred twenty thousand, six hundred forty-six".