42566193941 has 4 divisors (see below), whose sum is σ = 43556105472. Its totient is φ = 41576282412.

The previous prime is 42566193919. The next prime is 42566193949. The reversal of 42566193941 is 14939166524.

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 a de Polignac number, because none of the positive numbers 2^k-42566193941 is a prime.

It is a super-2 number, since 2×42566193941² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42566193941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42566193949) 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, 494955701 + ... + 494955786.

It is an arithmetic number, because the mean of its divisors is an integer number (10889026368).

Almost surely, 2^42566193941 is an apocalyptic number.

It is an amenable number.

42566193941 is a deficient number, since it is larger than the sum of its proper divisors (989911531).

42566193941 is an equidigital number, since it uses as much as digits as its factorization.

42566193941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989911530.

The product of its digits is 1399680, while the sum is 50.

The spelling of 42566193941 in words is "forty-two billion, five hundred sixty-six million, one hundred ninety-three thousand, nine hundred forty-one".