11661051055 has 8 divisors (see below), whose sum is σ = 14029236000. Its totient is φ = 9304857696.

The previous prime is 11661051049. The next prime is 11661051079. The reversal of 11661051055 is 55015016611.

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

It is a cyclic number.

It is not a de Polignac number, because 11661051055 - 2⁵ = 11661051023 is a prime.

It is a super-2 number, since 2×11661051055² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995755 + ... + 2999644.

It is an arithmetic number, because the mean of its divisors is an integer number (1753654500).

Almost surely, 2^11661051055 is an apocalyptic number.

11661051055 is a deficient number, since it is larger than the sum of its proper divisors (2368184945).

11661051055 is an equidigital number, since it uses as much as digits as its factorization.

11661051055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5995793.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 11661051055 its reverse (55015016611), we get a palindrome (66676067666).

The spelling of 11661051055 in words is "eleven billion, six hundred sixty-one million, fifty-one thousand, fifty-five".