3201626697481 has 3 divisors (see below), whose sum is σ = 3201628486791. Its totient is φ = 3201624908172.

The previous prime is 3201626697463. The next prime is 3201626697523. The reversal of 3201626697481 is 1847966261023.

The square root of 3201626697481 is 1789309.

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 can be written as a sum of positive squares in only one way, i.e., 2182294153081 + 1019332544400 = 1477259^2 + 1009620^2 .

It is not a de Polignac number, because 3201626697481 - 2⁹ = 3201626696969 is a prime.

It is a super-2 number, since 2×3201626697481² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3201626617481) 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, 894655 + ... + 2683963.

It is an arithmetic number, because the mean of its divisors is an integer number (1067209495597).

Almost surely, 2^{3201626697481} is an apocalyptic number.

3201626697481 is the 1789309-th square number.

3201626697481 is the 894655-th centered octagonal number.

It is an amenable number.

3201626697481 is a deficient number, since it is larger than the sum of its proper divisors (1789310).

3201626697481 is an frugal number, since it uses more digits than its factorization.

3201626697481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578618 (or 1789309 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 3201626697481 in words is "three trillion, two hundred one billion, six hundred twenty-six million, six hundred ninety-seven thousand, four hundred eighty-one".