649501165 has 8 divisors (see below), whose sum is σ = 779569920. Its totient is φ = 519488592.

The previous prime is 649501147. The next prime is 649501189. The reversal of 649501165 is 561105946.

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 649501165 - 2⁹ = 649500653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18072 + ... + 40318.

It is an arithmetic number, because the mean of its divisors is an integer number (97446240).

Almost surely, 2^649501165 is an apocalyptic number.

It is an amenable number.

649501165 is a deficient number, since it is larger than the sum of its proper divisors (130068755).

649501165 is a wasteful number, since it uses less digits than its factorization.

649501165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28091.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 649501165 is about 25485.3127310614. The cubic root of 649501165 is about 866.0174535611.

The spelling of 649501165 in words is "six hundred forty-nine million, five hundred one thousand, one hundred sixty-five".