11531330361611 has 48 divisors (see below), whose sum is σ = 12496965004800. Its totient is φ = 10636078781952.

The previous prime is 11531330361539. The next prime is 11531330361619. The reversal of 11531330361611 is 11616303313511.

It is a happy number.

It is not a de Polignac number, because 11531330361611 - 2¹⁰ = 11531330360587 is a prime.

It is a super-2 number, since 2×11531330361611² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11531330361619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2505174836 + ... + 2505179438.

It is an arithmetic number, because the mean of its divisors is an integer number (260353437600).

Almost surely, 2^{11531330361611} is an apocalyptic number.

11531330361611 is a deficient number, since it is larger than the sum of its proper divisors (965634643189).

11531330361611 is a wasteful number, since it uses less digits than its factorization.

11531330361611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508 (or 5491 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The spelling of 11531330361611 in words is "eleven trillion, five hundred thirty-one billion, three hundred thirty million, three hundred sixty-one thousand, six hundred eleven".