42360581881 has 2 divisors, whose sum is σ = 42360581882. Its totient is φ = 42360581880.

The previous prime is 42360581807. The next prime is 42360581899. The reversal of 42360581881 is 18818506324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40136516281 + 2224065600 = 200341^2 + 47160^2 .

It is a cyclic number.

It is not a de Polignac number, because 42360581881 - 2²⁷ = 42226364153 is a prime.

It is a super-2 number, since 2×42360581881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42360584881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21180290940 + 21180290941.

It is an arithmetic number, because the mean of its divisors is an integer number (21180290941).

Almost surely, 2^42360581881 is an apocalyptic number.

It is an amenable number.

42360581881 is a deficient number, since it is larger than the sum of its proper divisors (1).

42360581881 is an equidigital number, since it uses as much as digits as its factorization.

42360581881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 42360581881 in words is "forty-two billion, three hundred sixty million, five hundred eighty-one thousand, eight hundred eighty-one".