42861673009 has 2 divisors, whose sum is σ = 42861673010. Its totient is φ = 42861673008.

The previous prime is 42861672961. The next prime is 42861673031. The reversal of 42861673009 is 90037616824.

42861673009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38770791409 + 4090881600 = 196903^2 + 63960^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861673009 - 2⁷ = 42861672881 is a prime.

It is a super-2 number, since 2×42861673009² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42861673009.

It is not a weakly prime, because it can be changed into another prime (42861673109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430836504 + 21430836505.

It is an arithmetic number, because the mean of its divisors is an integer number (21430836505).

Almost surely, 2^42861673009 is an apocalyptic number.

It is an amenable number.

42861673009 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861673009 is an equidigital number, since it uses as much as digits as its factorization.

42861673009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 42861673009 in words is "forty-two billion, eight hundred sixty-one million, six hundred seventy-three thousand, nine".