1618609968 has 30 divisors (see below), whose sum is σ = 4529860244. Its totient is φ = 539536608.

The previous prime is 1618609957. The next prime is 1618610003. The reversal of 1618609968 is 8699068161.

1618609968 is a `hidden beast` number, since 16 + 18 + 609 + 9 + 6 + 8 = 666.

It is a super-2 number, since 2×1618609968² = 5239796457017922048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5620030 + ... + 5620317.

Almost surely, 2^1618609968 is an apocalyptic number.

1618609968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1618609968 is an abundant number, since it is smaller than the sum of its proper divisors (2911250276).

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

1618609968 is a wasteful number, since it uses less digits than its factorization.

1618609968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11240361 (or 11240352 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 1618609968 is about 40231.9520779194. The cubic root of 1618609968 is about 1174.1242831857.

The spelling of 1618609968 in words is "one billion, six hundred eighteen million, six hundred nine thousand, nine hundred sixty-eight".