4391749656 has 144 divisors (see below), whose sum is σ = 14063765040. Its totient is φ = 1234154880.

The previous prime is 4391749643. The next prime is 4391749667. The reversal of 4391749656 is 6569471934.

4391749656 is a `hidden beast` number, since 439 + 1 + 74 + 96 + 56 = 666.

It is a super-2 number, since 2×4391749656² = 38574930081952236672, which contains 22 as substring.

It is a congruent number.

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, 205005 + ... + 225411.

It is an arithmetic number, because the mean of its divisors is an integer number (97665035).

Almost surely, 2^4391749656 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 4391749656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7031882520).

4391749656 is an abundant number, since it is smaller than the sum of its proper divisors (9672015384).

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

4391749656 is a wasteful number, since it uses less digits than its factorization.

4391749656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20494 (or 20480 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 4391749656 is about 66270.2773194741. The cubic root of 4391749656 is about 1637.6177060932.

The spelling of 4391749656 in words is "four billion, three hundred ninety-one million, seven hundred forty-nine thousand, six hundred fifty-six".