654745644 has 108 divisors (see below), whose sum is σ = 1991808000. Its totient is φ = 180605376.

The previous prime is 654745603. The next prime is 654745691. The reversal of 654745644 is 446547456.

654745644 is a `hidden beast` number, since 6 + 547 + 45 + 64 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 654745644.

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 35 ways as a sum of consecutive naturals, for example, 44757 + ... + 57555.

Almost surely, 2^654745644 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 654745644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995904000).

654745644 is an abundant number, since it is smaller than the sum of its proper divisors (1337062356).

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

654745644 is a wasteful number, since it uses less digits than its factorization.

654745644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12852 (or 12840 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 45.

The square root of 654745644 is about 25587.9980459590. The cubic root of 654745644 is about 868.3421301303.

The spelling of 654745644 in words is "six hundred fifty-four million, seven hundred forty-five thousand, six hundred forty-four".