1618448520 has 128 divisors (see below), whose sum is σ = 5245430400. Its totient is φ = 397123584.

The previous prime is 1618448497. The next prime is 1618448537. The reversal of 1618448520 is 258448161.

It is a super-2 number, since 2×1618448520² = 5238751223780380800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 549211 + ... + 552149.

It is an arithmetic number, because the mean of its divisors is an integer number (40979925).

Almost surely, 2^1618448520 is an apocalyptic number.

1618448520 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 1618448520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2622715200).

1618448520 is an abundant number, since it is smaller than the sum of its proper divisors (3626981880).

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

1618448520 is a wasteful number, since it uses less digits than its factorization.

1618448520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319 (or 3315 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 1618448520 is about 40229.9455629758. The cubic root of 1618448520 is about 1174.0852442729.

The spelling of 1618448520 in words is "one billion, six hundred eighteen million, four hundred forty-eight thousand, five hundred twenty".