42281721867 has 24 divisors (see below), whose sum is σ = 71541617472. Its totient is φ = 21964530000.

The previous prime is 42281721817. The next prime is 42281721883. The reversal of 42281721867 is 76812718224.

It is not a de Polignac number, because 42281721867 - 2⁷ = 42281721739 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (42281721817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13072509 + ... + 13075742.

It is an arithmetic number, because the mean of its divisors is an integer number (2980900728).

Almost surely, 2^42281721867 is an apocalyptic number.

42281721867 is a deficient number, since it is larger than the sum of its proper divisors (29259895605).

42281721867 is a wasteful number, since it uses less digits than its factorization.

42281721867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26148279 (or 26148272 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The spelling of 42281721867 in words is "forty-two billion, two hundred eighty-one million, seven hundred twenty-one thousand, eight hundred sixty-seven".