11551516616613 has 4 divisors (see below), whose sum is σ = 15402022155488. Its totient is φ = 7701011077740.

The previous prime is 11551516616609. The next prime is 11551516616621. The reversal of 11551516616613 is 31661661515511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11551516616613 - 2² = 11551516616609 is a prime.

It is a super-2 number, since 2×11551516616613² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551516616623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925252769433 + ... + 1925252769438.

It is an arithmetic number, because the mean of its divisors is an integer number (3850505538872).

Almost surely, 2^{11551516616613} is an apocalyptic number.

It is an amenable number.

11551516616613 is a deficient number, since it is larger than the sum of its proper divisors (3850505538875).

11551516616613 is an equidigital number, since it uses as much as digits as its factorization.

11551516616613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850505538874.

The product of its digits is 486000, while the sum is 48.

The spelling of 11551516616613 in words is "eleven trillion, five hundred fifty-one billion, five hundred sixteen million, six hundred sixteen thousand, six hundred thirteen".