618949816 has 32 divisors (see below), whose sum is σ = 1182567600. Its totient is φ = 303654400.

The previous prime is 618949811. The next prime is 618949829.

618949816 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618949811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87915 + ... + 94693.

Almost surely, 2^618949816 is an apocalyptic number.

It is an amenable number.

618949816 is a deficient number, since it is larger than the sum of its proper divisors (563617784).

618949816 is a wasteful number, since it uses less digits than its factorization.

618949816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999 (or 6995 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 618949816 is about 24878.7020561765. The cubic root of 618949816 is about 852.2201779109.

The spelling of 618949816 in words is "six hundred eighteen million, nine hundred forty-nine thousand, eight hundred sixteen".