1118555144 has 96 divisors (see below), whose sum is σ = 2551046400. Its totient is φ = 457914240.

The previous prime is 1118555117. The next prime is 1118555147. The reversal of 1118555144 is 4415558111.

It is a super-2 number, since 2×1118555144² = 2502331220337721472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1118555147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1008062 + ... + 1009170.

It is an arithmetic number, because the mean of its divisors is an integer number (26573400).

Almost surely, 2^1118555144 is an apocalyptic number.

1118555144 is a gapful number since it is divisible by the number (14) 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 1118555144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275523200).

1118555144 is an abundant number, since it is smaller than the sum of its proper divisors (1432491256).

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

1118555144 is a wasteful number, since it uses less digits than its factorization.

1118555144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1232 counting only the distinct ones).

The product of its digits is 16000, while the sum is 35.

The square root of 1118555144 is about 33444.8074295547. The cubic root of 1118555144 is about 1038.0520563981.

The spelling of 1118555144 in words is "one billion, one hundred eighteen million, five hundred fifty-five thousand, one hundred forty-four".