649704420818 has 8 divisors (see below), whose sum is σ = 974575035120. Its totient is φ = 324846075780.

The previous prime is 649704420773. The next prime is 649704420839. The reversal of 649704420818 is 818024407946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 649704420818.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2933768 + ... + 3147443.

It is an arithmetic number, because the mean of its divisors is an integer number (121821879390).

Almost surely, 2^649704420818 is an apocalyptic number.

649704420818 is a deficient number, since it is larger than the sum of its proper divisors (324870614302).

649704420818 is a wasteful number, since it uses less digits than its factorization.

649704420818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134632.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 649704420818 in words is "six hundred forty-nine billion, seven hundred four million, four hundred twenty thousand, eight hundred eighteen".