12142445578 has 8 divisors (see below), whose sum is σ = 18220635972. Its totient is φ = 6068900256.

The previous prime is 12142445573. The next prime is 12142445593. The reversal of 12142445578 is 87554424121.

It can be written as a sum of positive squares in 2 ways, for example, as 12140293489 + 2152089 = 110183^2 + 1467^2 .

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

It is a super-2 number, since 2×12142445578² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12142445573) 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, 1154725 + ... + 1165192.

Almost surely, 2^12142445578 is an apocalyptic number.

12142445578 is a deficient number, since it is larger than the sum of its proper divisors (6078190394).

12142445578 is a wasteful number, since it uses less digits than its factorization.

12142445578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322536.

The product of its digits is 358400, while the sum is 43.

Adding to 12142445578 its reverse (87554424121), we get a palindrome (99696869699).

The spelling of 12142445578 in words is "twelve billion, one hundred forty-two million, four hundred forty-five thousand, five hundred seventy-eight".