1818749799 has 12 divisors (see below), whose sum is σ = 2656602000. Its totient is φ = 1198875744.

The previous prime is 1818749797. The next prime is 1818749839. The reversal of 1818749799 is 9979478181.

It is a happy number.

It is not a de Polignac number, because 1818749799 - 2¹ = 1818749797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818749797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1134499 + ... + 1136100.

It is an arithmetic number, because the mean of its divisors is an integer number (221383500).

Almost surely, 2^1818749799 is an apocalyptic number.

1818749799 is a deficient number, since it is larger than the sum of its proper divisors (837852201).

1818749799 is a wasteful number, since it uses less digits than its factorization.

1818749799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270694 (or 2270691 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 63.

The square root of 1818749799 is about 42646.8029165142. The cubic root of 1818749799 is about 1220.6495240168.

The spelling of 1818749799 in words is "one billion, eight hundred eighteen million, seven hundred forty-nine thousand, seven hundred ninety-nine".