649231185 has 32 divisors (see below), whose sum is σ = 1069407360. Its totient is φ = 336181248.

The previous prime is 649231183. The next prime is 649231211. The reversal of 649231185 is 581132946.

It is not a de Polignac number, because 649231185 - 2¹ = 649231183 is a prime.

It is a super-2 number, since 2×649231185² = 843002263153008450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (649231181) 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, 72906 + ... + 81324.

It is an arithmetic number, because the mean of its divisors is an integer number (33418980).

Almost surely, 2^649231185 is an apocalyptic number.

It is an amenable number.

649231185 is a deficient number, since it is larger than the sum of its proper divisors (420176175).

649231185 is a wasteful number, since it uses less digits than its factorization.

649231185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8577.

The product of its digits is 51840, while the sum is 39.

The square root of 649231185 is about 25480.0154042340. The cubic root of 649231185 is about 865.8974436170.

The spelling of 649231185 in words is "six hundred forty-nine million, two hundred thirty-one thousand, one hundred eighty-five".