1618738560 has 256 divisors, whose sum is σ = 5790744000. Its totient is φ = 427327488.

The previous prime is 1618738553. The next prime is 1618738579. The reversal of 1618738560 is 658378161.

1618738560 is a `hidden beast` number, since 1 + 6 + 1 + 87 + 3 + 8 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 1952226 + ... + 1953054.

Almost surely, 2^1618738560 is an apocalyptic number.

1618738560 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 1618738560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895372000).

1618738560 is an abundant number, since it is smaller than the sum of its proper divisors (4172005440).

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

1618738560 is a wasteful number, since it uses less digits than its factorization.

1618738560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1618738560 is about 40233.5501789241. The cubic root of 1618738560 is about 1174.1553755004.

The spelling of 1618738560 in words is "one billion, six hundred eighteen million, seven hundred thirty-eight thousand, five hundred sixty".