42115944511 has 2 divisors, whose sum is σ = 42115944512. Its totient is φ = 42115944510.

The previous prime is 42115944421. The next prime is 42115944523. The reversal of 42115944511 is 11544951124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42115944511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42115944911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21057972255 + 21057972256.

It is an arithmetic number, because the mean of its divisors is an integer number (21057972256).

Almost surely, 2^42115944511 is an apocalyptic number.

42115944511 is a deficient number, since it is larger than the sum of its proper divisors (1).

42115944511 is an equidigital number, since it uses as much as digits as its factorization.

42115944511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 37.

The spelling of 42115944511 in words is "forty-two billion, one hundred fifteen million, nine hundred forty-four thousand, five hundred eleven".