609813144 has 128 divisors (see below), whose sum is σ = 1742400000. Its totient is φ = 197541504.

The previous prime is 609813097. The next prime is 609813173. The reversal of 609813144 is 441318906.

609813144 is a `hidden beast` number, since 609 + 8 + 1 + 3 + 1 + 44 = 666.

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 = 609813099 and 609813108.

It is a congruent number.

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, 1388877 + ... + 1389315.

It is an arithmetic number, because the mean of its divisors is an integer number (13612500).

Almost surely, 2^609813144 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 609813144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871200000).

609813144 is an abundant number, since it is smaller than the sum of its proper divisors (1132586856).

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

609813144 is a wasteful number, since it uses less digits than its factorization.

609813144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 609813144 is about 24694.3949915765. The cubic root of 609813144 is about 848.0060037251.

The spelling of 609813144 in words is "six hundred nine million, eight hundred thirteen thousand, one hundred forty-four".