1816458144 has 96 divisors (see below), whose sum is σ = 4936329216. Its totient is φ = 584252160.

The previous prime is 1816458103. The next prime is 1816458167. The reversal of 1816458144 is 4418546181.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1816458096 and 1816458105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1389139 + ... + 1390445.

It is an arithmetic number, because the mean of its divisors is an integer number (51420096).

Almost surely, 2^1816458144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1816458144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2468164608).

1816458144 is an abundant number, since it is smaller than the sum of its proper divisors (3119871072).

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

1816458144 is a wasteful number, since it uses less digits than its factorization.

1816458144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1810 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The square root of 1816458144 is about 42619.9266071635. The cubic root of 1816458144 is about 1220.1366289695.

The spelling of 1816458144 in words is "one billion, eight hundred sixteen million, four hundred fifty-eight thousand, one hundred forty-four".