142605221544 has 128 divisors (see below), whose sum is σ = 417143424000. Its totient is φ = 45014968512.

The previous prime is 142605221501. The next prime is 142605221567. The reversal of 142605221544 is 445122506241.

142605221544 is a `hidden beast` number, since 1 + 4 + 2 + 60 + 52 + 2 + 1 + 544 = 666.

It is a super-2 number, since 2×142605221544² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 142605221499 and 142605221508.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13073997 + ... + 13084899.

It is an arithmetic number, because the mean of its divisors is an integer number (3258933000).

Almost surely, 2^142605221544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142605221544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208571712000).

142605221544 is an abundant number, since it is smaller than the sum of its proper divisors (274538202456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142605221544 is a wasteful number, since it uses less digits than its factorization.

142605221544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14124 (or 14114 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 142605221544 its reverse (445122506241), we get a palindrome (587727727785).

The spelling of 142605221544 in words is "one hundred forty-two billion, six hundred five million, two hundred twenty-one thousand, five hundred forty-four".