649675401 has 12 divisors (see below), whose sum is σ = 895082256. Its totient is φ = 419143560.

The previous prime is 649675363. The next prime is 649675409. The reversal of 649675401 is 104576946.

It is not a de Polignac number, because 649675401 - 2⁶ = 649675337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649675409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109791 + ... + 115556.

It is an arithmetic number, because the mean of its divisors is an integer number (74590188).

Almost surely, 2^649675401 is an apocalyptic number.

It is an amenable number.

649675401 is a deficient number, since it is larger than the sum of its proper divisors (245406855).

649675401 is a wasteful number, since it uses less digits than its factorization.

649675401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225412 (or 225381 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 649675401 is about 25488.7308628735. The cubic root of 649675401 is about 866.0948862815.

The spelling of 649675401 in words is "six hundred forty-nine million, six hundred seventy-five thousand, four hundred one".