42093497881 has 2 divisors, whose sum is σ = 42093497882. Its totient is φ = 42093497880.

The previous prime is 42093497869. The next prime is 42093497917. The reversal of 42093497881 is 18879439024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23017744656 + 19075753225 = 151716^2 + 138115^2 .

It is a cyclic number.

It is not a de Polignac number, because 42093497881 - 2¹³ = 42093489689 is a prime.

It is a super-2 number, since 2×42093497881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42093497821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21046748940 + 21046748941.

It is an arithmetic number, because the mean of its divisors is an integer number (21046748941).

Almost surely, 2^42093497881 is an apocalyptic number.

It is an amenable number.

42093497881 is a deficient number, since it is larger than the sum of its proper divisors (1).

42093497881 is an equidigital number, since it uses as much as digits as its factorization.

42093497881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 55.

It can be divided in two parts, 420934 and 97881, that added together give a palindrome (518815).

The spelling of 42093497881 in words is "forty-two billion, ninety-three million, four hundred ninety-seven thousand, eight hundred eighty-one".