11551155516651 has 8 divisors (see below), whose sum is σ = 15654024962704. Its totient is φ = 7574528207520.

The previous prime is 11551155516643. The next prime is 11551155516661. The reversal of 11551155516651 is 15661555115511.

11551155516651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11551155516651 - 2³ = 11551155516643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11551155516651.

It is not an unprimeable number, because it can be changed into a prime (11551155516661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31560534016 + ... + 31560534381.

It is an arithmetic number, because the mean of its divisors is an integer number (1956753120338).

Almost surely, 2^{11551155516651} is an apocalyptic number.

11551155516651 is a deficient number, since it is larger than the sum of its proper divisors (4102869446053).

11551155516651 is an equidigital number, since it uses as much as digits as its factorization.

11551155516651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63121068461.

The product of its digits is 562500, while the sum is 48.

It can be divided in two parts, 1155115 and 5516651, that added together give a palindrome (6671766).

The spelling of 11551155516651 in words is "eleven trillion, five hundred fifty-one billion, one hundred fifty-five million, five hundred sixteen thousand, six hundred fifty-one".