142381766135761 has 4 divisors (see below), whose sum is σ = 144715893449524. Its totient is φ = 140047638822000.

The previous prime is 142381766135683. The next prime is 142381766135863. The reversal of 142381766135761 is 167531667183241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1583963205136 + 140797802930625 = 1258556^2 + 11865825^2 .

It is a cyclic number.

It is not a de Polignac number, because 142381766135761 - 2⁴⁷ = 1644277780433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61), and also a Moran number because the ratio is a prime number: 2334127313701 = 142381766135761 / (1 + 4 + 2 + 3 + 8 + 1 + 7 + 6 + 6 + 1 + 3 + 5 + 7 + 6 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142381766135761.

It is not an unprimeable number, because it can be changed into a prime (142381766195761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1167063656790 + ... + 1167063656911.

It is an arithmetic number, because the mean of its divisors is an integer number (36178973362381).

Almost surely, 2^{142381766135761} is an apocalyptic number.

It is an amenable number.

142381766135761 is a deficient number, since it is larger than the sum of its proper divisors (2334127313763).

142381766135761 is an equidigital number, since it uses as much as digits as its factorization.

142381766135761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334127313762.

The product of its digits is 30481920, while the sum is 61.

The spelling of 142381766135761 in words is "one hundred forty-two trillion, three hundred eighty-one billion, seven hundred sixty-six million, one hundred thirty-five thousand, seven hundred sixty-one".