842774558643 has 6 divisors (see below), whose sum is σ = 1217341029164. Its totient is φ = 561849705756.

The previous prime is 842774558621. The next prime is 842774558653. The reversal of 842774558643 is 346855477248.

842774558643 is a `hidden beast` number, since 8 + 4 + 2 + 7 + 7 + 4 + 5 + 586 + 43 = 666.

It is not a de Polignac number, because 842774558643 - 2¹⁰ = 842774557619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842774558603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46820808805 + ... + 46820808822.

Almost surely, 2^842774558643 is an apocalyptic number.

842774558643 is a deficient number, since it is larger than the sum of its proper divisors (374566470521).

842774558643 is a wasteful number, since it uses less digits than its factorization.

842774558643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93641617633 (or 93641617630 counting only the distinct ones).

The product of its digits is 180633600, while the sum is 63.

The spelling of 842774558643 in words is "eight hundred forty-two billion, seven hundred seventy-four million, five hundred fifty-eight thousand, six hundred forty-three".