2611582049521 has 3 divisors (see below), whose sum is σ = 2611583665561. Its totient is φ = 2611580433482.

The previous prime is 2611582049509. The next prime is 2611582049617. The reversal of 2611582049521 is 1259402851162.

It is a happy number.

The square root of 2611582049521 is 1616039.

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 2611582049521 - 2⁹ = 2611582049009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2611582049621) 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, 808020 + ... + 2424058.

Almost surely, 2^{2611582049521} is an apocalyptic number.

2611582049521 is the 1616039-th square number.

2611582049521 is the 808020-th centered octagonal number.

It is an amenable number.

2611582049521 is a deficient number, since it is larger than the sum of its proper divisors (1616040).

2611582049521 is an frugal number, since it uses more digits than its factorization.

2611582049521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232078 (or 1616039 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 2611582049521 in words is "two trillion, six hundred eleven billion, five hundred eighty-two million, forty-nine thousand, five hundred twenty-one".