11315612654521 has 16 divisors (see below), whose sum is σ = 13177251673344. Its totient is φ = 9515285492544.

The previous prime is 11315612654513. The next prime is 11315612654527. The reversal of 11315612654521 is 12545621651311.

It is a cyclic number.

It is not a de Polignac number, because 11315612654521 - 2³ = 11315612654513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11315612654527) 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 15 ways as a sum of consecutive naturals, for example, 3091660 + ... + 5673586.

It is an arithmetic number, because the mean of its divisors is an integer number (823578229584).

Almost surely, 2^{11315612654521} is an apocalyptic number.

It is an amenable number.

11315612654521 is a deficient number, since it is larger than the sum of its proper divisors (1861639018823).

11315612654521 is a wasteful number, since it uses less digits than its factorization.

11315612654521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593800.

The product of its digits is 216000, while the sum is 43.

The spelling of 11315612654521 in words is "eleven trillion, three hundred fifteen billion, six hundred twelve million, six hundred fifty-four thousand, five hundred twenty-one".