11728749680 has 40 divisors (see below), whose sum is σ = 27313942272. Its totient is φ = 4683826944.

The previous prime is 11728749677. The next prime is 11728749707. The reversal of 11728749680 is 8694782711.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×11728749680² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 70544 + ... + 168623.

Almost surely, 2^11728749680 is an apocalyptic number.

11728749680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11728749680 is an abundant number, since it is smaller than the sum of its proper divisors (15585192592).

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

11728749680 is a wasteful number, since it uses less digits than its factorization.

11728749680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239793 (or 239787 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 11728749680 in words is "eleven billion, seven hundred twenty-eight million, seven hundred forty-nine thousand, six hundred eighty".