649508163 has 16 divisors (see below), whose sum is σ = 902880000. Its totient is φ = 414951264.

The previous prime is 649508161. The next prime is 649508191. The reversal of 649508163 is 361805946.

It is not a de Polignac number, because 649508163 - 2¹ = 649508161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649508161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40663 + ... + 54336.

It is an arithmetic number, because the mean of its divisors is an integer number (56430000).

Almost surely, 2^649508163 is an apocalyptic number.

649508163 is a deficient number, since it is larger than the sum of its proper divisors (253371837).

649508163 is a wasteful number, since it uses less digits than its factorization.

649508163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95098.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 649508163 is about 25485.4500254557. The cubic root of 649508163 is about 866.0205638292.

The spelling of 649508163 in words is "six hundred forty-nine million, five hundred eight thousand, one hundred sixty-three".