111155253440 has 672 divisors, whose sum is σ = 359358322176. Its totient is φ = 32269762560.

The previous prime is 111155253427. The next prime is 111155253467. The reversal of 111155253440 is 44352551111.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 111155253397 and 111155253406.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 489670607 + ... + 489670833.

It is an arithmetic number, because the mean of its divisors is an integer number (534759408).

Almost surely, 2^111155253440 is an apocalyptic number.

111155253440 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 111155253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179679161088).

111155253440 is an abundant number, since it is smaller than the sum of its proper divisors (248203068736).

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

111155253440 is a wasteful number, since it uses less digits than its factorization.

111155253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 111155253440 in words is "one hundred eleven billion, one hundred fifty-five million, two hundred fifty-three thousand, four hundred forty".