142724662581 has 32 divisors (see below), whose sum is σ = 203209395840. Its totient is φ = 88931678976.

The previous prime is 142724662559. The next prime is 142724662583. The reversal of 142724662581 is 185266427241.

It is not a de Polignac number, because 142724662581 - 2¹⁵ = 142724629813 is a prime.

It is a super-2 number, since 2×142724662581² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142724662581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142724662583) 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 31 ways as a sum of consecutive naturals, for example, 521610 + ... + 746676.

It is an arithmetic number, because the mean of its divisors is an integer number (6350293620).

Almost surely, 2^142724662581 is an apocalyptic number.

It is an amenable number.

142724662581 is a deficient number, since it is larger than the sum of its proper divisors (60484733259).

142724662581 is a wasteful number, since it uses less digits than its factorization.

142724662581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225333.

The product of its digits is 1290240, while the sum is 48.

The spelling of 142724662581 in words is "one hundred forty-two billion, seven hundred twenty-four million, six hundred sixty-two thousand, five hundred eighty-one".