649711577418 has 8 divisors (see below), whose sum is σ = 1299423154848. Its totient is φ = 216570525804.

The previous prime is 649711577407. The next prime is 649711577447. The reversal of 649711577418 is 814775117946.

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

649711577418 is an admirable number.

It is a Curzon number.

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, 54142631446 + ... + 54142631457.

It is an arithmetic number, because the mean of its divisors is an integer number (162427894356).

Almost surely, 2^649711577418 is an apocalyptic number.

649711577418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649711577418 is a wasteful number, since it uses less digits than its factorization.

649711577418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108285262908.

The product of its digits is 11854080, while the sum is 60.

The spelling of 649711577418 in words is "six hundred forty-nine billion, seven hundred eleven million, five hundred seventy-seven thousand, four hundred eighteen".