3640533849 has 32 divisors (see below), whose sum is σ = 5548032000. Its totient is φ = 2358180432.

The previous prime is 3640533829. The next prime is 3640533851. The reversal of 3640533849 is 9483350463.

3640533849 is a `hidden beast` number, since 36 + 4 + 0 + 533 + 84 + 9 = 666.

It is not a de Polignac number, because 3640533849 - 2⁸ = 3640533593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3640533829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166072 + ... + 186710.

It is an arithmetic number, because the mean of its divisors is an integer number (173376000).

Almost surely, 2^3640533849 is an apocalyptic number.

It is an amenable number.

3640533849 is a deficient number, since it is larger than the sum of its proper divisors (1907498151).

3640533849 is a wasteful number, since it uses less digits than its factorization.

3640533849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20834 (or 20828 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The square root of 3640533849 is about 60336.8365842957. The cubic root of 3640533849 is about 1538.3495345546.

The spelling of 3640533849 in words is "three billion, six hundred forty million, five hundred thirty-three thousand, eight hundred forty-nine".