42145921769 has 8 divisors (see below), whose sum is σ = 48180999168. Its totient is φ = 36114402240.

The previous prime is 42145921747. The next prime is 42145921793. The reversal of 42145921769 is 96712954124.

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

It is a de Polignac number, because none of the positive numbers 2^k-42145921769 is a prime.

It is a super-2 number, since 2×42145921769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42145921729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864032 + ... + 911505.

It is an arithmetic number, because the mean of its divisors is an integer number (6022624896).

Almost surely, 2^42145921769 is an apocalyptic number.

It is an amenable number.

42145921769 is a deficient number, since it is larger than the sum of its proper divisors (6035077399).

42145921769 is a wasteful number, since it uses less digits than its factorization.

42145921769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778935.

The product of its digits is 1088640, while the sum is 50.

The spelling of 42145921769 in words is "forty-two billion, one hundred forty-five million, nine hundred twenty-one thousand, seven hundred sixty-nine".