42776845679 has 2 divisors, whose sum is σ = 42776845680. Its totient is φ = 42776845678.

The previous prime is 42776845637. The next prime is 42776845723. The reversal of 42776845679 is 97654867724.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42776845679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42776845379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21388422839 + 21388422840.

It is an arithmetic number, because the mean of its divisors is an integer number (21388422840).

Almost surely, 2^42776845679 is an apocalyptic number.

42776845679 is a deficient number, since it is larger than the sum of its proper divisors (1).

42776845679 is an equidigital number, since it uses as much as digits as its factorization.

42776845679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142248960, while the sum is 65.

The spelling of 42776845679 in words is "forty-two billion, seven hundred seventy-six million, eight hundred forty-five thousand, six hundred seventy-nine".