42717620819 has 2 divisors, whose sum is σ = 42717620820. Its totient is φ = 42717620818.

The previous prime is 42717620809. The next prime is 42717620833. The reversal of 42717620819 is 91802671724.

42717620819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42717620819 - 2⁸ = 42717620563 is a prime.

It is a super-2 number, since 2×42717620819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42717620809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21358810409 + 21358810410.

It is an arithmetic number, because the mean of its divisors is an integer number (21358810410).

Almost surely, 2^42717620819 is an apocalyptic number.

42717620819 is a deficient number, since it is larger than the sum of its proper divisors (1).

42717620819 is an equidigital number, since it uses as much as digits as its factorization.

42717620819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 42717620819 in words is "forty-two billion, seven hundred seventeen million, six hundred twenty thousand, eight hundred nineteen".