42774246643 has 4 divisors (see below), whose sum is σ = 42774663960. Its totient is φ = 42773829328.

The previous prime is 42774246631. The next prime is 42774246659. The reversal of 42774246643 is 34664247724.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42774246643 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42774246673) 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, 62871 + ... + 299167.

It is an arithmetic number, because the mean of its divisors is an integer number (10693665990).

Almost surely, 2^42774246643 is an apocalyptic number.

42774246643 is a deficient number, since it is larger than the sum of its proper divisors (417317).

42774246643 is a wasteful number, since it uses less digits than its factorization.

42774246643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417316.

The product of its digits is 5419008, while the sum is 49.

The spelling of 42774246643 in words is "forty-two billion, seven hundred seventy-four million, two hundred forty-six thousand, six hundred forty-three".