42775458091 has 4 divisors (see below), whose sum is σ = 43413897832. Its totient is φ = 42137018352.

The previous prime is 42775458071. The next prime is 42775458109. The reversal of 42775458091 is 19085457724.

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

It is a cyclic number.

It is not a de Polignac number, because 42775458091 - 2²⁹ = 42238587179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42775458031) 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, 319219770 + ... + 319219903.

It is an arithmetic number, because the mean of its divisors is an integer number (10853474458).

Almost surely, 2^42775458091 is an apocalyptic number.

42775458091 is a deficient number, since it is larger than the sum of its proper divisors (638439741).

42775458091 is an equidigital number, since it uses as much as digits as its factorization.

42775458091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638439740.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 42775458091 in words is "forty-two billion, seven hundred seventy-five million, four hundred fifty-eight thousand, ninety-one".