11815579106 has 4 divisors (see below), whose sum is σ = 17723368662. Its totient is φ = 5907789552.

The previous prime is 11815579073. The next prime is 11815579117. The reversal of 11815579106 is 60197551811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60197551811 = 41 ⋅1468232971.

It can be written as a sum of positive squares in only one way, i.e., 9494748481 + 2320830625 = 97441^2 + 48175^2 .

It is a super-2 number, since 2×11815579106² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2953894775 + ... + 2953894778.

Almost surely, 2^11815579106 is an apocalyptic number.

11815579106 is a deficient number, since it is larger than the sum of its proper divisors (5907789556).

11815579106 is an equidigital number, since it uses as much as digits as its factorization.

11815579106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907789555.

The product of its (nonzero) digits is 75600, while the sum is 44.

The spelling of 11815579106 in words is "eleven billion, eight hundred fifteen million, five hundred seventy-nine thousand, one hundred six".