142442161651 has 4 divisors (see below), whose sum is σ = 142445855704. Its totient is φ = 142438467600.

The previous prime is 142442161637. The next prime is 142442161681. The reversal of 142442161651 is 156161244241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156161244241 = 152833 ⋅1021777.

It is a cyclic number.

It is not a de Polignac number, because 142442161651 - 2¹³ = 142442153459 is a prime.

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 142442161651.

It is not an unprimeable number, because it can be changed into a prime (142442161681) 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, 1788570 + ... + 1866511.

It is an arithmetic number, because the mean of its divisors is an integer number (35611463926).

Almost surely, 2^142442161651 is an apocalyptic number.

142442161651 is a deficient number, since it is larger than the sum of its proper divisors (3694053).

142442161651 is an equidigital number, since it uses as much as digits as its factorization.

142442161651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694052.

The product of its digits is 46080, while the sum is 37.

The spelling of 142442161651 in words is "one hundred forty-two billion, four hundred forty-two million, one hundred sixty-one thousand, six hundred fifty-one".