6449699718 has 96 divisors (see below), whose sum is σ = 17520572160. Its totient is φ = 1665823680.

The previous prime is 6449699689. The next prime is 6449699741. The reversal of 6449699718 is 8179969446.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 235096 + ... + 261092.

It is an arithmetic number, because the mean of its divisors is an integer number (182505960).

Almost surely, 2^6449699718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6449699718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8760286080).

6449699718 is an abundant number, since it is smaller than the sum of its proper divisors (11070872442).

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

6449699718 is a wasteful number, since it uses less digits than its factorization.

6449699718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26202 (or 26199 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 6449699718 is about 80310.0225252116. The cubic root of 6449699718 is about 1861.4290976736.

The spelling of 6449699718 in words is "six billion, four hundred forty-nine million, six hundred ninety-nine thousand, seven hundred eighteen".