42606894991 has 2 divisors, whose sum is σ = 42606894992. Its totient is φ = 42606894990.

The previous prime is 42606894961. The next prime is 42606895103. The reversal of 42606894991 is 19949860624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42606894991 - 2⁵ = 42606894959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42606894901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21303447495 + 21303447496.

It is an arithmetic number, because the mean of its divisors is an integer number (21303447496).

Almost surely, 2^42606894991 is an apocalyptic number.

42606894991 is a deficient number, since it is larger than the sum of its proper divisors (1).

42606894991 is an equidigital number, since it uses as much as digits as its factorization.

42606894991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 42606894991 in words is "forty-two billion, six hundred six million, eight hundred ninety-four thousand, nine hundred ninety-one".