12115054440 has 128 divisors (see below), whose sum is σ = 40483728000. Its totient is φ = 3222664704.

The previous prime is 12115054429. The next prime is 12115054451. The reversal of 12115054440 is 4445051121.

12115054440 is a `hidden beast` number, since 1 + 2 + 115 + 0 + 544 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (12115054429) and next prime (12115054451).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428007 + ... + 455433.

It is an arithmetic number, because the mean of its divisors is an integer number (316279125).

Almost surely, 2^12115054440 is an apocalyptic number.

12115054440 is a gapful number since it is divisible by the number (10) 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 12115054440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20241864000).

12115054440 is an abundant number, since it is smaller than the sum of its proper divisors (28368673560).

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

12115054440 is a wasteful number, since it uses less digits than its factorization.

12115054440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27856 (or 27846 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 12115054440 in words is "twelve billion, one hundred fifteen million, fifty-four thousand, four hundred forty".