42105975748891 has 8 divisors (see below), whose sum is σ = 42438401922560. Its totient is φ = 41773563373248.

The previous prime is 42105975748883. The next prime is 42105975748961. The reversal of 42105975748891 is 19884757950124.

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

It is a cyclic number.

It is not a de Polignac number, because 42105975748891 - 2³ = 42105975748883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42105975748891.

It is not an unprimeable number, because it can be changed into a prime (42105975748391) 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, 2721175 + ... + 9571663.

It is an arithmetic number, because the mean of its divisors is an integer number (5304800240320).

Almost surely, 2^{42105975748891} is an apocalyptic number.

42105975748891 is a deficient number, since it is larger than the sum of its proper divisors (332426173669).

42105975748891 is a wasteful number, since it uses less digits than its factorization.

42105975748891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6899013.

The product of its (nonzero) digits is 203212800, while the sum is 70.

The spelling of 42105975748891 in words is "forty-two trillion, one hundred five billion, nine hundred seventy-five million, seven hundred forty-eight thousand, eight hundred ninety-one".