142185778612281 has 96 divisors (see below), whose sum is σ = 233192623104000. Its totient is φ = 85372893967680.

The previous prime is 142185778612243. The next prime is 142185778612291. The reversal of 142185778612281 is 182216877581241.

It is a happy number.

142185778612281 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 8 + 5 + 7 + 7 + 8 + 612 + 2 + 8 + 1 = 666.

It is not a de Polignac number, because 142185778612281 - 2¹⁸ = 142185778350137 is a prime.

It is a super-2 number, since 2×142185778612281² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142185778612291) 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 95 ways as a sum of consecutive naturals, for example, 23657070 + ... + 29052168.

It is an arithmetic number, because the mean of its divisors is an integer number (2429089824000).

Almost surely, 2^{142185778612281} is an apocalyptic number.

It is an amenable number.

142185778612281 is a deficient number, since it is larger than the sum of its proper divisors (91006844491719).

142185778612281 is a wasteful number, since it uses less digits than its factorization.

142185778612281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395236 (or 5395193 counting only the distinct ones).

The product of its digits is 24084480, while the sum is 63.

The spelling of 142185778612281 in words is "one hundred forty-two trillion, one hundred eighty-five billion, seven hundred seventy-eight million, six hundred twelve thousand, two hundred eighty-one".