142578121549 has 8 divisors (see below), whose sum is σ = 150142101120. Its totient is φ = 135127886256.

The previous prime is 142578121537. The next prime is 142578121573. The reversal of 142578121549 is 945121875241.

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 142578121549 - 2¹¹ = 142578119501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142578121849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28433497 + ... + 28438510.

It is an arithmetic number, because the mean of its divisors is an integer number (18767762640).

Almost surely, 2^142578121549 is an apocalyptic number.

It is an amenable number.

142578121549 is a deficient number, since it is larger than the sum of its proper divisors (7563979571).

142578121549 is a wasteful number, since it uses less digits than its factorization.

142578121549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56872139.

The product of its digits is 806400, while the sum is 49.

The spelling of 142578121549 in words is "one hundred forty-two billion, five hundred seventy-eight million, one hundred twenty-one thousand, five hundred forty-nine".