181428387859 has 2 divisors, whose sum is σ = 181428387860. Its totient is φ = 181428387858.

The previous prime is 181428387799. The next prime is 181428387913. The reversal of 181428387859 is 958783824181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 181428387859 - 2¹¹ = 181428385811 is a prime.

It is a super-2 number, since 2×181428387859² (a number of 23 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 181428387859.

It is not a weakly prime, because it can be changed into another prime (181426387859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90714193929 + 90714193930.

It is an arithmetic number, because the mean of its divisors is an integer number (90714193930).

Almost surely, 2^181428387859 is an apocalyptic number.

181428387859 is a deficient number, since it is larger than the sum of its proper divisors (1).

181428387859 is an equidigital number, since it uses as much as digits as its factorization.

181428387859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30965760, while the sum is 64.

The spelling of 181428387859 in words is "one hundred eighty-one billion, four hundred twenty-eight million, three hundred eighty-seven thousand, eight hundred fifty-nine".