3268180611721 has 3 divisors (see below), whose sum is σ = 3268182419533. Its totient is φ = 3268178803910.

The previous prime is 3268180611719. The next prime is 3268180611749. The reversal of 3268180611721 is 1271160818623.

The square root of 3268180611721 is 1807811.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 3268180611721 - 2¹ = 3268180611719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3268180611781) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 903906 + ... + 2711716.

Almost surely, 2^{3268180611721} is an apocalyptic number.

3268180611721 is the 1807811-st square number.

3268180611721 is the 903906-th centered octagonal number.

It is an amenable number.

3268180611721 is a deficient number, since it is larger than the sum of its proper divisors (1807812).

3268180611721 is an frugal number, since it uses more digits than its factorization.

3268180611721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615622 (or 1807811 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 3268180611721 in words is "three trillion, two hundred sixty-eight billion, one hundred eighty million, six hundred eleven thousand, seven hundred twenty-one".