3646403712 has 384 divisors, whose sum is σ = 12919271040. Its totient is φ = 963477504.

The previous prime is 3646403701. The next prime is 3646403723. The reversal of 3646403712 is 2173046463.

It is a happy number.

3646403712 is a `hidden beast` number, since 3 + 6 + 4 + 640 + 3 + 7 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (3646403701) and next prime (3646403723).

It is a tau number, because it is divible by the number of its divisors (384).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9184698 + ... + 9185094.

It is an arithmetic number, because the mean of its divisors is an integer number (33643935).

Almost surely, 2^3646403712 is an apocalyptic number.

3646403712 is a gapful number since it is divisible by the number (32) 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 3646403712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6459635520).

3646403712 is an abundant number, since it is smaller than the sum of its proper divisors (9272867328).

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

3646403712 is a wasteful number, since it uses less digits than its factorization.

3646403712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 3646403712 is about 60385.4594418226. The cubic root of 3646403712 is about 1539.1758833421.

The spelling of 3646403712 in words is "three billion, six hundred forty-six million, four hundred three thousand, seven hundred twelve".