618495646 has 4 divisors (see below), whose sum is σ = 927743472. Its totient is φ = 309247822.

The previous prime is 618495641. The next prime is 618495707. The reversal of 618495646 is 646594816.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 618495646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618495641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154623910 + ... + 154623913.

It is an arithmetic number, because the mean of its divisors is an integer number (231935868).

Almost surely, 2^618495646 is an apocalyptic number.

618495646 is a deficient number, since it is larger than the sum of its proper divisors (309247826).

618495646 is a wasteful number, since it uses less digits than its factorization.

618495646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309247825.

The product of its digits is 1244160, while the sum is 49.

The square root of 618495646 is about 24869.5726943589. The cubic root of 618495646 is about 852.0116809070.

The spelling of 618495646 in words is "six hundred eighteen million, four hundred ninety-five thousand, six hundred forty-six".