649500761 has 8 divisors (see below), whose sum is σ = 799385664. Its totient is φ = 513890640.

The previous prime is 649500757. The next prime is 649500773. The reversal of 649500761 is 167005946.

649500761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 649500761 - 2² = 649500757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649500361) 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, 3568595 + ... + 3568776.

It is an arithmetic number, because the mean of its divisors is an integer number (99923208).

Almost surely, 2^649500761 is an apocalyptic number.

It is an amenable number.

649500761 is a deficient number, since it is larger than the sum of its proper divisors (149884903).

649500761 is a wasteful number, since it uses less digits than its factorization.

649500761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137391.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 649500761 is about 25485.3048049263. The cubic root of 649500761 is about 866.0172740022.

The spelling of 649500761 in words is "six hundred forty-nine million, five hundred thousand, seven hundred sixty-one".