42618481919 has 4 divisors (see below), whose sum is σ = 45896826696. Its totient is φ = 39340137144.

The previous prime is 42618481903. The next prime is 42618481951. The reversal of 42618481919 is 91918481624.

It is a happy number.

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 42618481919 - 2⁴ = 42618481903 is a prime.

It is a super-2 number, since 2×42618481919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42618481019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1639172369 + ... + 1639172394.

It is an arithmetic number, because the mean of its divisors is an integer number (11474206674).

Almost surely, 2^42618481919 is an apocalyptic number.

42618481919 is a deficient number, since it is larger than the sum of its proper divisors (3278344777).

42618481919 is a wasteful number, since it uses less digits than its factorization.

42618481919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278344776.

The product of its digits is 995328, while the sum is 53.

The spelling of 42618481919 in words is "forty-two billion, six hundred eighteen million, four hundred eighty-one thousand, nine hundred nineteen".