3261664136 has 8 divisors (see below), whose sum is σ = 6115620270. Its totient is φ = 1630832064.

The previous prime is 3261664129. The next prime is 3261664151. The reversal of 3261664136 is 6314661623.

It can be written as a sum of positive squares in only one way, i.e., 2969596036 + 292068100 = 54494^2 + 17090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 3261664136.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203854001 + ... + 203854016.

Almost surely, 2^3261664136 is an apocalyptic number.

It is an amenable number.

3261664136 is a deficient number, since it is larger than the sum of its proper divisors (2853956134).

3261664136 is a wasteful number, since it uses less digits than its factorization.

3261664136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407708023 (or 407708019 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The square root of 3261664136 is about 57110.9808705821. The cubic root of 3261664136 is about 1483.0179675589.

The spelling of 3261664136 in words is "three billion, two hundred sixty-one million, six hundred sixty-four thousand, one hundred thirty-six".