2511322551613 has 4 divisors (see below), whose sum is σ = 2511460425820. Its totient is φ = 2511184677408.

The previous prime is 2511322551593. The next prime is 2511322551629. The reversal of 2511322551613 is 3161552231152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1403056833049 + 1108265718564 = 1184507^2 + 1052742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2511322551613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2511322551653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68909778 + ... + 68946211.

It is an arithmetic number, because the mean of its divisors is an integer number (627865106455).

Almost surely, 2^{2511322551613} is an apocalyptic number.

It is an amenable number.

2511322551613 is a deficient number, since it is larger than the sum of its proper divisors (137874207).

2511322551613 is a wasteful number, since it uses less digits than its factorization.

2511322551613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137874206.

The product of its digits is 54000, while the sum is 37.

Adding to 2511322551613 its reverse (3161552231152), we get a palindrome (5672874782765).

The spelling of 2511322551613 in words is "two trillion, five hundred eleven billion, three hundred twenty-two million, five hundred fifty-one thousand, six hundred thirteen".