3645208512 has 84 divisors (see below), whose sum is σ = 11398200216. Its totient is φ = 1104606720.

The previous prime is 3645208487. The next prime is 3645208517. The reversal of 3645208512 is 2158025463.

3645208512 is a `hidden beast` number, since 3 + 645 + 2 + 0 + 8 + 5 + 1 + 2 = 666.

3645208512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645208517) 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, 281323 + ... + 293994.

Almost surely, 2^3645208512 is an apocalyptic number.

3645208512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3645208512 is an abundant number, since it is smaller than the sum of its proper divisors (7752991704).

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

3645208512 is a wasteful number, since it uses less digits than its factorization.

3645208512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575346 (or 575333 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 3645208512 is about 60375.5622085625. The cubic root of 3645208512 is about 1539.0076971700.

The spelling of 3645208512 in words is "three billion, six hundred forty-five million, two hundred eight thousand, five hundred twelve".