42091284441961 has 4 divisors (see below), whose sum is σ = 42102225772672. Its totient is φ = 42080343111252.

The previous prime is 42091284441917. The next prime is 42091284441991. The reversal of 42091284441961 is 16914448219024.

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 not a de Polignac number, because 42091284441961 - 2¹³ = 42091284433769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42091284441991) 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 3 ways as a sum of consecutive naturals, for example, 5470659585 + ... + 5470667278.

It is an arithmetic number, because the mean of its divisors is an integer number (10525556443168).

Almost surely, 2^{42091284441961} is an apocalyptic number.

It is an amenable number.

42091284441961 is a deficient number, since it is larger than the sum of its proper divisors (10941330711).

42091284441961 is a wasteful number, since it uses less digits than its factorization.

42091284441961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10941330710.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 42091284441961 in words is "forty-two trillion, ninety-one billion, two hundred eighty-four million, four hundred forty-one thousand, nine hundred sixty-one".