42353221645 has 16 divisors (see below), whose sum is σ = 58176499968. Its totient is φ = 28996168320.

The previous prime is 42353221627. The next prime is 42353221699. The reversal of 42353221645 is 54612235324.

It is not a de Polignac number, because 42353221645 - 2²⁷ = 42219003917 is a prime.

It is a super-3 number, since 3×42353221645³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 936784 + ... + 980953.

It is an arithmetic number, because the mean of its divisors is an integer number (3636031248).

Almost surely, 2^42353221645 is an apocalyptic number.

It is an amenable number.

42353221645 is a deficient number, since it is larger than the sum of its proper divisors (15823278323).

42353221645 is a wasteful number, since it uses less digits than its factorization.

42353221645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918380.

The product of its digits is 172800, while the sum is 37.

Adding to 42353221645 its reverse (54612235324), we get a palindrome (96965456969).

The spelling of 42353221645 in words is "forty-two billion, three hundred fifty-three million, two hundred twenty-one thousand, six hundred forty-five".