649500663 has 8 divisors (see below), whose sum is σ = 989715328. Its totient is φ = 371143224.

The previous prime is 649500653. The next prime is 649500667. The reversal of 649500663 is 366005946.

It is a happy number.

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

It is not a de Polignac number, because 649500663 - 2¹³ = 649492471 is a prime.

It is a super-2 number, since 2×649500663² = 843702222474879138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649500667) 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, 15464281 + ... + 15464322.

It is an arithmetic number, because the mean of its divisors is an integer number (123714416).

Almost surely, 2^649500663 is an apocalyptic number.

649500663 is a deficient number, since it is larger than the sum of its proper divisors (340214665).

649500663 is a wasteful number, since it uses less digits than its factorization.

649500663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30928613.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 649500663 is about 25485.3028822496. The cubic root of 649500663 is about 866.0172304458.

The spelling of 649500663 in words is "six hundred forty-nine million, five hundred thousand, six hundred sixty-three".