11663561331115 has 8 divisors (see below), whose sum is σ = 14188003373088. Its totient is φ = 9203029214400.

The previous prime is 11663561331101. The next prime is 11663561331167. The reversal of 11663561331115 is 51113316536611.

11663561331115 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 11663561331115 - 2⁷ = 11663561330987 is a prime.

It is a super-2 number, since 2×11663561331115² (a number of 27 digits) contains 22 as substring.

It is a Duffinian 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, 15977480911 + ... + 15977481640.

It is an arithmetic number, because the mean of its divisors is an integer number (1773500421636).

Almost surely, 2^{11663561331115} is an apocalyptic number.

11663561331115 is a deficient number, since it is larger than the sum of its proper divisors (2524442041973).

11663561331115 is an equidigital number, since it uses as much as digits as its factorization.

11663561331115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31954962629.

The product of its digits is 145800, while the sum is 43.

Adding to 11663561331115 its reverse (51113316536611), we get a palindrome (62776877867726).

The spelling of 11663561331115 in words is "eleven trillion, six hundred sixty-three billion, five hundred sixty-one million, three hundred thirty-one thousand, one hundred fifteen".