42687194291 has 4 divisors (see below), whose sum is σ = 48785364912. Its totient is φ = 36589023672.

The previous prime is 42687194279. The next prime is 42687194299. The reversal of 42687194291 is 19249178624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42687194291 - 2¹⁰ = 42687193267 is a prime.

It is a super-3 number, since 3×42687194291³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42687194299) 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, 3049085300 + ... + 3049085313.

It is an arithmetic number, because the mean of its divisors is an integer number (12196341228).

Almost surely, 2^42687194291 is an apocalyptic number.

42687194291 is a deficient number, since it is larger than the sum of its proper divisors (6098170621).

42687194291 is an equidigital number, since it uses as much as digits as its factorization.

42687194291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6098170620.

The product of its digits is 1741824, while the sum is 53.

The spelling of 42687194291 in words is "forty-two billion, six hundred eighty-seven million, one hundred ninety-four thousand, two hundred ninety-one".