142809921604 has 27 divisors (see below), whose sum is σ = 290730968157. Its totient is φ = 61201984704.

The previous prime is 142809921587. The next prime is 142809921679. The reversal of 142809921604 is 406129908241.

The square root of 142809921604 is 377902.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6536722500 + 136273199104 = 80850^2 + 369152^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5277132 + ... + 5304124.

Almost surely, 2^142809921604 is an apocalyptic number.

142809921604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

142809921604 is the 377902-nd square number.

It is an amenable number.

142809921604 is an abundant number, since it is smaller than the sum of its proper divisors (147921046553).

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

142809921604 is an frugal number, since it uses more digits than its factorization.

142809921604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54004 (or 27002 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 142809921604 in words is "one hundred forty-two billion, eight hundred nine million, nine hundred twenty-one thousand, six hundred four".