649691852 has 24 divisors (see below), whose sum is σ = 1204854000. Its totient is φ = 305678016.

The previous prime is 649691827. The next prime is 649691869. The reversal of 649691852 is 258196946.

It is a self number, because there is not a number n which added to its sum of digits gives 649691852.

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, 17363 + ... + 40010.

It is an arithmetic number, because the mean of its divisors is an integer number (50202250).

Almost surely, 2^649691852 is an apocalyptic number.

It is an amenable number.

649691852 is a deficient number, since it is larger than the sum of its proper divisors (555162148).

649691852 is a wasteful number, since it uses less digits than its factorization.

649691852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57545 (or 57543 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 649691852 is about 25489.0535720729. The cubic root of 649691852 is about 866.1021966022.

The spelling of 649691852 in words is "six hundred forty-nine million, six hundred ninety-one thousand, eight hundred fifty-two".