649496567 has 4 divisors (see below), whose sum is σ = 653385936. Its totient is φ = 645607200.

The previous prime is 649496537. The next prime is 649496623. The reversal of 649496567 is 765694946.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649496567 - 2¹² = 649492471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649496537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944434 + ... + 1944767.

It is an arithmetic number, because the mean of its divisors is an integer number (163346484).

Almost surely, 2^649496567 is an apocalyptic number.

649496567 is a deficient number, since it is larger than the sum of its proper divisors (3889369).

649496567 is a wasteful number, since it uses less digits than its factorization.

649496567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889368.

The product of its digits is 9797760, while the sum is 56.

The square root of 649496567 is about 25485.2225220813. Note that the first 3 decimals coincide. The cubic root of 649496567 is about 866.0154099632.

The spelling of 649496567 in words is "six hundred forty-nine million, four hundred ninety-six thousand, five hundred sixty-seven".