142212443661 has 10 divisors (see below), whose sum is σ = 212440811022. Its totient is φ = 94808295720.

The previous prime is 142212443591. The next prime is 142212443687. The reversal of 142212443661 is 166344212241.

142212443661 is a `hidden beast` number, since 1 + 4 + 2 + 212 + 4 + 436 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110087258436 + 32125185225 = 331794^2 + 179235^2 .

It is not a de Polignac number, because 142212443661 - 2¹⁷ = 142212312589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142212442661) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 877854510 + ... + 877854671.

Almost surely, 2^142212443661 is an apocalyptic number.

It is an amenable number.

142212443661 is a deficient number, since it is larger than the sum of its proper divisors (70228367361).

142212443661 is an equidigital number, since it uses as much as digits as its factorization.

142212443661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755709193 (or 1755709184 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The spelling of 142212443661 in words is "one hundred forty-two billion, two hundred twelve million, four hundred forty-three thousand, six hundred sixty-one".