3640780785 has 32 divisors (see below), whose sum is σ = 6030288000. Its totient is φ = 1873496576.

The previous prime is 3640780777. The next prime is 3640780811. The reversal of 3640780785 is 5870870463.

3640780785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3640780785 - 2³ = 3640780777 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 1224781 + ... + 1227749.

It is an arithmetic number, because the mean of its divisors is an integer number (188446500).

Almost surely, 2^3640780785 is an apocalyptic number.

It is an amenable number.

3640780785 is a deficient number, since it is larger than the sum of its proper divisors (2389507215).

3640780785 is a wasteful number, since it uses less digits than its factorization.

3640780785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 3640780785 is about 60338.8828617170. The cubic root of 3640780785 is about 1538.3843156524.

The spelling of 3640780785 in words is "three billion, six hundred forty million, seven hundred eighty thousand, seven hundred eighty-five".