649586331 has 16 divisors (see below), whose sum is σ = 969932800. Its totient is φ = 429645384.

The previous prime is 649586323. The next prime is 649586351. The reversal of 649586331 is 133685946.

649586331 is a `hidden beast` number, since 6 + 4 + 9 + 5 + 8 + 633 + 1 = 666.

It is not a de Polignac number, because 649586331 - 2³ = 649586323 is a prime.

It is a super-2 number, since 2×649586331² = 843924802844083122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649586321) 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 15 ways as a sum of consecutive naturals, for example, 91291 + ... + 98148.

It is an arithmetic number, because the mean of its divisors is an integer number (60620800).

Almost surely, 2^649586331 is an apocalyptic number.

649586331 is a deficient number, since it is larger than the sum of its proper divisors (320346469).

649586331 is a wasteful number, since it uses less digits than its factorization.

649586331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189575 (or 189569 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 649586331 is about 25486.9835602411. The cubic root of 649586331 is about 866.0553041573.

It can be divided in two parts, 64958 and 6331, that added together give a square (71289 = 267²).

The spelling of 649586331 in words is "six hundred forty-nine million, five hundred eighty-six thousand, three hundred thirty-one".