11915140872 has 64 divisors (see below), whose sum is σ = 30900844800. Its totient is φ = 3825768960.

The previous prime is 11915140859. The next prime is 11915140877. The reversal of 11915140872 is 27804151911.

It is a self number, because there is not a number n which added to its sum of digits gives 11915140872.

It is not an unprimeable number, because it can be changed into a prime (11915140877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098 + ... + 154374.

It is an arithmetic number, because the mean of its divisors is an integer number (482825700).

Almost surely, 2^11915140872 is an apocalyptic number.

11915140872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11915140872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15450422400).

11915140872 is an abundant number, since it is smaller than the sum of its proper divisors (18985703928).

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

11915140872 is a wasteful number, since it uses less digits than its factorization.

11915140872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153406 (or 153402 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 39.

The spelling of 11915140872 in words is "eleven billion, nine hundred fifteen million, one hundred forty thousand, eight hundred seventy-two".