649368722 has 18 divisors (see below), whose sum is σ = 1003150197. Its totient is φ = 315260424.

The previous prime is 649368697. The next prime is 649368751. The reversal of 649368722 is 227863946.

It can be written as a sum of positive squares in 2 ways, for example, as 523906321 + 125462401 = 22889^2 + 11201^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18019.

It is a super-2 number, since 2×649368722² = 843359474223826568, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1333163 + ... + 1333649.

Almost surely, 2^649368722 is an apocalyptic number.

649368722 is a deficient number, since it is larger than the sum of its proper divisors (353781475).

649368722 is an frugal number, since it uses more digits than its factorization.

649368722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 526 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 649368722 is about 25482.7141804008. The cubic root of 649368722 is about 865.9585849232.

The spelling of 649368722 in words is "six hundred forty-nine million, three hundred sixty-eight thousand, seven hundred twenty-two".