1618030081 has 4 divisors (see below), whose sum is σ = 1628745664. Its totient is φ = 1607314500.

The previous prime is 1618030049. The next prime is 1618030087. The reversal of 1618030081 is 1800308161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1618030081 - 2⁵ = 1618030049 is a prime.

It is a super-2 number, since 2×1618030081² = 5236042686041733122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1618030087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357565 + ... + 5357866.

It is an arithmetic number, because the mean of its divisors is an integer number (407186416).

Almost surely, 2^1618030081 is an apocalyptic number.

It is an amenable number.

1618030081 is a deficient number, since it is larger than the sum of its proper divisors (10715583).

1618030081 is a wasteful number, since it uses less digits than its factorization.

1618030081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10715582.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1618030081 is about 40224.7446356096. The cubic root of 1618030081 is about 1173.9840515988.

The spelling of 1618030081 in words is "one billion, six hundred eighteen million, thirty thousand, eighty-one".