142661311511 has 4 divisors (see below), whose sum is σ = 143111347512. Its totient is φ = 142211275512.

The previous prime is 142661311487. The next prime is 142661311523. The reversal of 142661311511 is 115113166241.

142661311511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142661311511 - 2¹⁰ = 142661310487 is a prime.

It is a super-2 number, since 2×142661311511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142661311591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225017525 + ... + 225018158.

It is an arithmetic number, because the mean of its divisors is an integer number (35777836878).

Almost surely, 2^142661311511 is an apocalyptic number.

142661311511 is a deficient number, since it is larger than the sum of its proper divisors (450036001).

142661311511 is an equidigital number, since it uses as much as digits as its factorization.

142661311511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450036000.

The product of its digits is 4320, while the sum is 32.

Adding to 142661311511 its reverse (115113166241), we get a palindrome (257774477752).

The spelling of 142661311511 in words is "one hundred forty-two billion, six hundred sixty-one million, three hundred eleven thousand, five hundred eleven".