42193958581 has 16 divisors (see below), whose sum is σ = 44963553600. Its totient is φ = 39523120000.

The previous prime is 42193958567. The next prime is 42193958627. The reversal of 42193958581 is 18585939124.

It is a cyclic number.

It is not a de Polignac number, because 42193958581 - 2⁷ = 42193958453 is a prime.

It is a super-2 number, since 2×42193958581² (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 (42193958531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113706 + ... + 311956.

It is an arithmetic number, because the mean of its divisors is an integer number (2810222100).

Almost surely, 2^42193958581 is an apocalyptic number.

42193958581 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42193958581 is a deficient number, since it is larger than the sum of its proper divisors (2769595019).

42193958581 is a wasteful number, since it uses less digits than its factorization.

42193958581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198500.

The product of its digits is 3110400, while the sum is 55.

The spelling of 42193958581 in words is "forty-two billion, one hundred ninety-three million, nine hundred fifty-eight thousand, five hundred eighty-one".