3649452768 has 72 divisors (see below), whose sum is σ = 11176460568. Its totient is φ = 1122907392.

The previous prime is 3649452761. The next prime is 3649452799. The reversal of 3649452768 is 8672549463.

3649452768 is a `hidden beast` number, since 36 + 494 + 52 + 76 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649452761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 483630 + ... + 491117.

It is an arithmetic number, because the mean of its divisors is an integer number (155228619).

Almost surely, 2^3649452768 is an apocalyptic number.

It is an amenable number.

3649452768 is an abundant number, since it is smaller than the sum of its proper divisors (7527007800).

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

3649452768 is a wasteful number, since it uses less digits than its factorization.

3649452768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974776 (or 974765 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The square root of 3649452768 is about 60410.7007739523. The cubic root of 3649452768 is about 1539.6047740486.

The spelling of 3649452768 in words is "three billion, six hundred forty-nine million, four hundred fifty-two thousand, seven hundred sixty-eight".