11947129580 has 48 divisors (see below), whose sum is σ = 25205938464. Its totient is φ = 4756631040.

The previous prime is 11947129553. The next prime is 11947129583. The reversal of 11947129580 is 8592174911.

11947129580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11947129583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4402304 + ... + 4405016.

It is an arithmetic number, because the mean of its divisors is an integer number (525123718).

Almost surely, 2^11947129580 is an apocalyptic number.

11947129580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11947129580 is an abundant number, since it is smaller than the sum of its proper divisors (13258808884).

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

11947129580 is a wasteful number, since it uses less digits than its factorization.

11947129580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666 (or 3664 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The spelling of 11947129580 in words is "eleven billion, nine hundred forty-seven million, one hundred twenty-nine thousand, five hundred eighty".