4642545921681 has 8 divisors (see below), whose sum is σ = 6211934237920. Its totient is φ = 3084094109952.

The previous prime is 4642545921659. The next prime is 4642545921731. The reversal of 4642545921681 is 1861295452464.

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

It is not a de Polignac number, because 4642545921681 - 2¹⁴ = 4642545905297 is a prime.

It is a super-2 number, since 2×4642545921681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4642545921581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2734125136 + ... + 2734126833.

It is an arithmetic number, because the mean of its divisors is an integer number (776491779740).

Almost surely, 2^{4642545921681} is an apocalyptic number.

It is an amenable number.

4642545921681 is a deficient number, since it is larger than the sum of its proper divisors (1569388316239).

4642545921681 is a wasteful number, since it uses less digits than its factorization.

4642545921681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468252255.

The product of its digits is 16588800, while the sum is 57.

The spelling of 4642545921681 in words is "four trillion, six hundred forty-two billion, five hundred forty-five million, nine hundred twenty-one thousand, six hundred eighty-one".