11551666615253 has 4 divisors (see below), whose sum is σ = 11670755961900. Its totient is φ = 11432577268608.

The previous prime is 11551666615187. The next prime is 11551666615339. The reversal of 11551666615253 is 35251666615511.

11551666615253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2554684362244 + 8996982253009 = 1598338^2 + 2999497^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551666615253 - 2²⁰ = 11551665566677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11551666615195 and 11551666615204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551666675253) 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, 59544673178 + ... + 59544673371.

It is an arithmetic number, because the mean of its divisors is an integer number (2917688990475).

Almost surely, 2^{11551666615253} is an apocalyptic number.

It is an amenable number.

11551666615253 is a deficient number, since it is larger than the sum of its proper divisors (119089346647).

11551666615253 is an equidigital number, since it uses as much as digits as its factorization.

11551666615253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119089346646.

The product of its digits is 4860000, while the sum is 53.

The spelling of 11551666615253 in words is "eleven trillion, five hundred fifty-one billion, six hundred sixty-six million, six hundred fifteen thousand, two hundred fifty-three".