11994406656 has 36 divisors (see below), whose sum is σ = 31922615592. Its totient is φ = 3998135296.

The previous prime is 11994406649. The next prime is 11994406657. The reversal of 11994406656 is 65660449911.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11994406599 and 11994406608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11994406657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7808091 + ... + 7809626.

It is an arithmetic number, because the mean of its divisors is an integer number (886739322).

Almost surely, 2^11994406656 is an apocalyptic number.

11994406656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11994406656 is an abundant number, since it is smaller than the sum of its proper divisors (19928208936).

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

11994406656 is an equidigital number, since it uses as much as digits as its factorization.

11994406656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15617736 (or 15617722 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 11994406656 in words is "eleven billion, nine hundred ninety-four million, four hundred six thousand, six hundred fifty-six".