42775522791 has 8 divisors (see below), whose sum is σ = 60388973424. Its totient is φ = 26839543680.

The previous prime is 42775522747. The next prime is 42775522817. The reversal of 42775522791 is 19722557724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42775522791 - 2⁷ = 42775522663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 838735741 = 42775522791 / (4 + 2 + 7 + 7 + 5 + 5 + 2 + 2 + 7 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42775522591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419367820 + ... + 419367921.

It is an arithmetic number, because the mean of its divisors is an integer number (7548621678).

Almost surely, 2^42775522791 is an apocalyptic number.

42775522791 is a deficient number, since it is larger than the sum of its proper divisors (17613450633).

42775522791 is a wasteful number, since it uses less digits than its factorization.

42775522791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838735761.

The product of its digits is 2469600, while the sum is 51.

The spelling of 42775522791 in words is "forty-two billion, seven hundred seventy-five million, five hundred twenty-two thousand, seven hundred ninety-one".