11651651226 has 48 divisors (see below), whose sum is σ = 26624052000. Its totient is φ = 3818045808.

The previous prime is 11651651201. The next prime is 11651651239. The reversal of 11651651226 is 62215615611.

11651651226 is a `hidden beast` number, since 1 + 16 + 516 + 5 + 122 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174501 + ... + 231848.

It is an arithmetic number, because the mean of its divisors is an integer number (554667750).

Almost surely, 2^11651651226 is an apocalyptic number.

11651651226 is an abundant number, since it is smaller than the sum of its proper divisors (14972400774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11651651226 is an equidigital number, since it uses as much as digits as its factorization.

11651651226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406425 (or 406413 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The spelling of 11651651226 in words is "eleven billion, six hundred fifty-one million, six hundred fifty-one thousand, two hundred twenty-six".