649870801 has 8 divisors (see below), whose sum is σ = 656409600. Its totient is φ = 643361328.

The previous prime is 649870783. The next prime is 649870807. The reversal of 649870801 is 108078946.

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

It is a cyclic number.

It is not a de Polignac number, because 649870801 - 2⁵ = 649870769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649870807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38640 + ... + 52846.

It is an arithmetic number, because the mean of its divisors is an integer number (82051200).

Almost surely, 2^649870801 is an apocalyptic number.

It is an amenable number.

649870801 is a deficient number, since it is larger than the sum of its proper divisors (6538799).

649870801 is a wasteful number, since it uses less digits than its factorization.

649870801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14663.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 649870801 is about 25492.5636411876. The cubic root of 649870801 is about 866.1817080885.

The spelling of 649870801 in words is "six hundred forty-nine million, eight hundred seventy thousand, eight hundred one".