42775846581 has 8 divisors (see below), whose sum is σ = 61421728480. Its totient is φ = 26323597872.

The previous prime is 42775846567. The next prime is 42775846621. The reversal of 42775846581 is 18564857724.

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

It is not a de Polignac number, because 42775846581 - 2²² = 42771652277 is a prime.

It is a super-2 number, since 2×42775846581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42775846511) 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, 548408251 + ... + 548408328.

It is an arithmetic number, because the mean of its divisors is an integer number (7677716060).

Almost surely, 2^42775846581 is an apocalyptic number.

It is an amenable number.

42775846581 is a deficient number, since it is larger than the sum of its proper divisors (18645881899).

42775846581 is a wasteful number, since it uses less digits than its factorization.

42775846581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096816595.

The product of its digits is 15052800, while the sum is 57.

The spelling of 42775846581 in words is "forty-two billion, seven hundred seventy-five million, eight hundred forty-six thousand, five hundred eighty-one".