3644406612 has 144 divisors (see below), whose sum is σ = 11796150912. Its totient is φ = 920989440.

The previous prime is 3644406589. The next prime is 3644406659. The reversal of 3644406612 is 2166044463.

3644406612 is a `hidden beast` number, since 3 + 644 + 4 + 0 + 6 + 6 + 1 + 2 = 666.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84798 + ... + 120330.

Almost surely, 2^3644406612 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 3644406612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5898075456).

3644406612 is an abundant number, since it is smaller than the sum of its proper divisors (8151744300).

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

3644406612 is a wasteful number, since it uses less digits than its factorization.

3644406612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35598 (or 35593 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 3644406612 is about 60368.9209113431. The cubic root of 3644406612 is about 1538.8948347849.

The spelling of 3644406612 in words is "three billion, six hundred forty-four million, four hundred six thousand, six hundred twelve".