142307728581 has 16 divisors (see below), whose sum is σ = 198029869056. Its totient is φ = 90730224816.

The previous prime is 142307728573. The next prime is 142307728597. The reversal of 142307728581 is 185827703241.

It is not a de Polignac number, because 142307728581 - 2³ = 142307728573 is a prime.

It is a super-2 number, since 2×142307728581² (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 142307728581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142307728571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192316 + ... + 567098.

It is an arithmetic number, because the mean of its divisors is an integer number (12376866816).

Almost surely, 2^142307728581 is an apocalyptic number.

It is an amenable number.

142307728581 is a deficient number, since it is larger than the sum of its proper divisors (55722140475).

142307728581 is a wasteful number, since it uses less digits than its factorization.

142307728581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380312.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 142307728581 in words is "one hundred forty-two billion, three hundred seven million, seven hundred twenty-eight thousand, five hundred eighty-one".