11661423123315 has 32 divisors (see below), whose sum is σ = 22059046702080. Its totient is φ = 5147110894464.

The previous prime is 11661423123289. The next prime is 11661423123319. The reversal of 11661423123315 is 51332132416611.

It is not a de Polignac number, because 11661423123315 - 2⁷ = 11661423123187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11661423123319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1914844759 + ... + 1914850848.

It is an arithmetic number, because the mean of its divisors is an integer number (689345209440).

Almost surely, 2^{11661423123315} is an apocalyptic number.

11661423123315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11661423123315 is a deficient number, since it is larger than the sum of its proper divisors (10397623578765).

11661423123315 is a wasteful number, since it uses less digits than its factorization.

11661423123315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829695651.

The product of its digits is 77760, while the sum is 39.

Adding to 11661423123315 its reverse (51332132416611), we get a palindrome (62993555539926).

The spelling of 11661423123315 in words is "eleven trillion, six hundred sixty-one billion, four hundred twenty-three million, one hundred twenty-three thousand, three hundred fifteen".