42776845673 has 4 divisors (see below), whose sum is σ = 43217844180. Its totient is φ = 42335847168.

The previous prime is 42776845637. The next prime is 42776845679. The reversal of 42776845673 is 37654867724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23835654544 + 18941191129 = 154388^2 + 137627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42776845673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42776845679) 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, 220499108 + ... + 220499301.

It is an arithmetic number, because the mean of its divisors is an integer number (10804461045).

Almost surely, 2^42776845673 is an apocalyptic number.

It is an amenable number.

42776845673 is a deficient number, since it is larger than the sum of its proper divisors (440998507).

42776845673 is an equidigital number, since it uses as much as digits as its factorization.

42776845673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440998506.

The product of its digits is 47416320, while the sum is 59.

The spelling of 42776845673 in words is "forty-two billion, seven hundred seventy-six million, eight hundred forty-five thousand, six hundred seventy-three".