11551666615245 has 24 divisors (see below), whose sum is σ = 20023738745400. Its totient is φ = 6160627339776.

The previous prime is 11551666615187. The next prime is 11551666615339. The reversal of 11551666615245 is 54251666615511.

11551666615245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 158631737796 + 11393034877449 = 398286^2 + 3375357^2 .

It is not a de Polignac number, because 11551666615245 - 2⁷ = 11551666615117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11551666615191 and 11551666615200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4374160 + ... + 6498969.

It is an arithmetic number, because the mean of its divisors is an integer number (834322447725).

Almost surely, 2^{11551666615245} is an apocalyptic number.

11551666615245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11551666615245 is a deficient number, since it is larger than the sum of its proper divisors (8472072130155).

11551666615245 is a wasteful number, since it uses less digits than its factorization.

11551666615245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10896749 (or 10896746 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 54.

The spelling of 11551666615245 in words is "eleven trillion, five hundred fifty-one billion, six hundred sixty-six million, six hundred fifteen thousand, two hundred forty-five".