11447780680 has 32 divisors (see below), whose sum is σ = 29437151040. Its totient is φ = 3924953280.

The previous prime is 11447780677. The next prime is 11447780689. The reversal of 11447780680 is 8608774411.

It is a self number, because there is not a number n which added to its sum of digits gives 11447780680.

It is not an unprimeable number, because it can be changed into a prime (11447780689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20442186 + ... + 20442745.

It is an arithmetic number, because the mean of its divisors is an integer number (919910970).

Almost surely, 2^11447780680 is an apocalyptic number.

11447780680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11447780680 is an abundant number, since it is smaller than the sum of its proper divisors (17989370360).

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

11447780680 is a wasteful number, since it uses less digits than its factorization.

11447780680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40884949 (or 40884945 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 46.

The spelling of 11447780680 in words is "eleven billion, four hundred forty-seven million, seven hundred eighty thousand, six hundred eighty".