42356307991 has 2 divisors, whose sum is σ = 42356307992. Its totient is φ = 42356307990.

The previous prime is 42356307979. The next prime is 42356308013. The reversal of 42356307991 is 19970365324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42356307991 - 2¹⁵ = 42356275223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42356307971) 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, 21178153995 + 21178153996.

It is an arithmetic number, because the mean of its divisors is an integer number (21178153996).

Almost surely, 2^42356307991 is an apocalyptic number.

42356307991 is a deficient number, since it is larger than the sum of its proper divisors (1).

42356307991 is an equidigital number, since it uses as much as digits as its factorization.

42356307991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 42356307991 in words is "forty-two billion, three hundred fifty-six million, three hundred seven thousand, nine hundred ninety-one".