3818513664 has 504 divisors, whose sum is σ = 13583279360. Its totient is φ = 1048080384.

The previous prime is 3818513653. The next prime is 3818513683. The reversal of 3818513664 is 4663158183.

3818513664 is a `hidden beast` number, since 381 + 85 + 136 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

Its product of digits (414720) is a multiple of the sum of its prime divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 48335577 + ... + 48335655.

Almost surely, 2^3818513664 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 3818513664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6791639680).

3818513664 is an abundant number, since it is smaller than the sum of its proper divisors (9764765696).

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

3818513664 is an frugal number, since it uses more digits than its factorization.

3818513664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 128 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 3818513664 is about 61794.1232157234. The cubic root of 3818513664 is about 1563.0208919220.

The spelling of 3818513664 in words is "three billion, eight hundred eighteen million, five hundred thirteen thousand, six hundred sixty-four".