649994918396 has 24 divisors (see below), whose sum is σ = 1144411462656. Its totient is φ = 323023087280.

The previous prime is 649994918393. The next prime is 649994918411. The reversal of 649994918396 is 693819499946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649994918393) 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, 548495 + ... + 1265241.

It is an arithmetic number, because the mean of its divisors is an integer number (47683810944).

Almost surely, 2^649994918396 is an apocalyptic number.

It is an amenable number.

649994918396 is a deficient number, since it is larger than the sum of its proper divisors (494416544260).

649994918396 is a wasteful number, since it uses less digits than its factorization.

649994918396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718129 (or 718127 counting only the distinct ones).

The product of its digits is 816293376, while the sum is 77.

The spelling of 649994918396 in words is "six hundred forty-nine billion, nine hundred ninety-four million, nine hundred eighteen thousand, three hundred ninety-six".