42406444919 has 2 divisors, whose sum is σ = 42406444920. Its totient is φ = 42406444918.

The previous prime is 42406444867. The next prime is 42406444999. The reversal of 42406444919 is 91944460424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42406444919 - 2¹⁶ = 42406379383 is a prime.

It is a super-2 number, since 2×42406444919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42406444999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21203222459 + 21203222460.

It is an arithmetic number, because the mean of its divisors is an integer number (21203222460).

Almost surely, 2^42406444919 is an apocalyptic number.

42406444919 is a deficient number, since it is larger than the sum of its proper divisors (1).

42406444919 is an equidigital number, since it uses as much as digits as its factorization.

42406444919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 42406444919 in words is "forty-two billion, four hundred six million, four hundred forty-four thousand, nine hundred nineteen".