1618558799 has 18 divisors (see below), whose sum is σ = 1926480528. Its totient is φ = 1358214000.

The previous prime is 1618558771. The next prime is 1618558801. The reversal of 1618558799 is 9978558161.

It is not a de Polignac number, because 1618558799 - 2²⁴ = 1601781583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618558709) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19127 + ... + 60024.

It is an arithmetic number, because the mean of its divisors is an integer number (107026696).

Almost surely, 2^1618558799 is an apocalyptic number.

1618558799 is a deficient number, since it is larger than the sum of its proper divisors (307921729).

1618558799 is a wasteful number, since it uses less digits than its factorization.

1618558799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79199 (or 79175 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 59.

The square root of 1618558799 is about 40231.3161479960. The cubic root of 1618558799 is about 1174.1119105533. Note that the first 3 decimals are identical.

The spelling of 1618558799 in words is "one billion, six hundred eighteen million, five hundred fifty-eight thousand, seven hundred ninety-nine".