1618160640 has 176 divisors, whose sum is σ = 5480916192. Its totient is φ = 406061056.

The previous prime is 1618160629. The next prime is 1618160641. The reversal of 1618160640 is 460618161.

It is not an unprimeable number, because it can be changed into a prime (1618160641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258022 + ... + 264218.

Almost surely, 2^1618160640 is an apocalyptic number.

1618160640 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 1618160640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2740458096).

1618160640 is an abundant number, since it is smaller than the sum of its proper divisors (3862755552).

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

1618160640 is a wasteful number, since it uses less digits than its factorization.

1618160640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6242 (or 6224 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1618160640 is about 40226.3674720947. The cubic root of 1618160640 is about 1174.0156270442.

The spelling of 1618160640 in words is "one billion, six hundred eighteen million, one hundred sixty thousand, six hundred forty".