11681213480 has 32 divisors (see below), whose sum is σ = 26285812200. Its totient is φ = 4671937536.

The previous prime is 11681213459. The next prime is 11681213491. The reversal of 11681213480 is 8431218611.

It can be written as a sum of positive squares in 4 ways, for example, as 5268727396 + 6412486084 = 72586^2 + 80078^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11681213480.

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, 633836 + ... + 652004.

Almost surely, 2^11681213480 is an apocalyptic number.

11681213480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11681213480 is an abundant number, since it is smaller than the sum of its proper divisors (14604598720).

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

11681213480 is a wasteful number, since it uses less digits than its factorization.

11681213480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34253 (or 34249 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 11681213480 in words is "eleven billion, six hundred eighty-one million, two hundred thirteen thousand, four hundred eighty".