649159567 has 32 divisors (see below), whose sum is σ = 821376000. Its totient is φ = 500214528.

The previous prime is 649159493. The next prime is 649159573. The reversal of 649159567 is 765951946.

It is a cyclic number.

It is not a de Polignac number, because 649159567 - 2¹¹ = 649157519 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649159597) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418309 + ... + 419857.

It is an arithmetic number, because the mean of its divisors is an integer number (25668000).

Almost surely, 2^649159567 is an apocalyptic number.

649159567 is a deficient number, since it is larger than the sum of its proper divisors (172216433).

649159567 is a wasteful number, since it uses less digits than its factorization.

649159567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735.

The product of its digits is 2041200, while the sum is 52.

The square root of 649159567 is about 25478.6099895579. The cubic root of 649159567 is about 865.8656028157.

The spelling of 649159567 in words is "six hundred forty-nine million, one hundred fifty-nine thousand, five hundred sixty-seven".