42146105981 has 4 divisors (see below), whose sum is σ = 48166978272. Its totient is φ = 36125233692.

The previous prime is 42146105929. The next prime is 42146106047. The reversal of 42146105981 is 18950164124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42146105981 is a prime.

It is a super-2 number, since 2×42146105981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42146107981) 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 3 ways as a sum of consecutive naturals, for example, 3010436135 + ... + 3010436148.

It is an arithmetic number, because the mean of its divisors is an integer number (12041744568).

Almost surely, 2^42146105981 is an apocalyptic number.

It is an amenable number.

42146105981 is a deficient number, since it is larger than the sum of its proper divisors (6020872291).

42146105981 is an equidigital number, since it uses as much as digits as its factorization.

42146105981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020872290.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 42146105981 in words is "forty-two billion, one hundred forty-six million, one hundred five thousand, nine hundred eighty-one".