142165421639 has 8 divisors (see below), whose sum is σ = 143310034512. Its totient is φ = 141024520000.

The previous prime is 142165421557. The next prime is 142165421687. The reversal of 142165421639 is 936124561241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142165421639 - 2⁸ = 142165421383 is a prime.

It is a super-2 number, since 2×142165421639² (a number of 23 digits) contains 22 as substring.

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 142165421639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142165421689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850862 + ... + 1004139.

It is an arithmetic number, because the mean of its divisors is an integer number (17913754314).

Almost surely, 2^142165421639 is an apocalyptic number.

142165421639 is a deficient number, since it is larger than the sum of its proper divisors (1144612873).

142165421639 is a wasteful number, since it uses less digits than its factorization.

142165421639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855617.

The product of its digits is 311040, while the sum is 44.

The spelling of 142165421639 in words is "one hundred forty-two billion, one hundred sixty-five million, four hundred twenty-one thousand, six hundred thirty-nine".