142015936187809 has 2 divisors, whose sum is σ = 142015936187810. Its totient is φ = 142015936187808.

The previous prime is 142015936187803. The next prime is 142015936187821. The reversal of 142015936187809 is 908781639510241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124728244512400 + 17287691675409 = 11168180^2 + 4157847^2 .

It is a cyclic number.

It is not a de Polignac number, because 142015936187809 - 2²⁵ = 142015902633377 is a prime.

It is a super-2 number, since 2×142015936187809² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142015936187803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71007968093904 + 71007968093905.

It is an arithmetic number, because the mean of its divisors is an integer number (71007968093905).

It is a 1-persistent number, because it is pandigital, but 2⋅142015936187809 = 284031872375618 is not.

Almost surely, 2^{142015936187809} is an apocalyptic number.

It is an amenable number.

142015936187809 is a deficient number, since it is larger than the sum of its proper divisors (1).

142015936187809 is an equidigital number, since it uses as much as digits as its factorization.

142015936187809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 142015936187809 in words is "one hundred forty-two trillion, fifteen billion, nine hundred thirty-six million, one hundred eighty-seven thousand, eight hundred nine".