4461649920 has 1008 divisors, whose sum is σ = 20394869040. Its totient is φ = 891813888.

The previous prime is 4461649919. The next prime is 4461649931. The reversal of 4461649920 is 299461644.

4461649920 is a `hidden beast` number, since 4 + 4 + 616 + 4 + 9 + 9 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 234823671 + ... + 234823689.

It is an arithmetic number, because the mean of its divisors is an integer number (20233005).

Almost surely, 2^4461649920 is an apocalyptic number.

4461649920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4461649920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10197434520).

4461649920 is an abundant number, since it is smaller than the sum of its proper divisors (15933219120).

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

4461649920 is a wasteful number, since it uses less digits than its factorization.

4461649920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 4461649920 is about 66795.5830875066. The cubic root of 4461649920 is about 1646.2602685799.

The spelling of 4461649920 in words is "four billion, four hundred sixty-one million, six hundred forty-nine thousand, nine hundred twenty".