3256645636 has 12 divisors (see below), whose sum is σ = 5763165660. Its totient is φ = 1610026880.

The previous prime is 3256645607. The next prime is 3256645673. The reversal of 3256645636 is 6365466523.

It can be written as a sum of positive squares in 2 ways, for example, as 1429596100 + 1827049536 = 37810^2 + 42744^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4573585 + ... + 4574296.

It is an arithmetic number, because the mean of its divisors is an integer number (480263805).

Almost surely, 2^3256645636 is an apocalyptic number.

It is an amenable number.

3256645636 is a deficient number, since it is larger than the sum of its proper divisors (2506520024).

3256645636 is a wasteful number, since it uses less digits than its factorization.

3256645636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9147974 (or 9147972 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 46.

The square root of 3256645636 is about 57067.0275728463. The cubic root of 3256645636 is about 1482.2569709502.

The spelling of 3256645636 in words is "three billion, two hundred fifty-six million, six hundred forty-five thousand, six hundred thirty-six".