3649536000 has 640 divisors, whose sum is σ = 14844463920. Its totient is φ = 884736000.

The previous prime is 3649535987. The next prime is 3649536043. The reversal of 3649536000 is 6359463.

3649536000 is a `hidden beast` number, since 3 + 6 + 49 + 5 + 3 + 600 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×3649536000² = 26638226030592000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 331775995 + ... + 331776005.

Almost surely, 2^3649536000 is an apocalyptic number.

3649536000 is a gapful number since it is divisible by the number (30) 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 3649536000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7422231960).

3649536000 is an abundant number, since it is smaller than the sum of its proper divisors (11194927920).

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

3649536000 is an frugal number, since it uses more digits than its factorization.

3649536000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 3649536000 is about 60411.3896546007. The cubic root of 3649536000 is about 1539.6164783980.

The spelling of 3649536000 in words is "three billion, six hundred forty-nine million, five hundred thirty-six thousand".