649867494 has 16 divisors (see below), whose sum is σ = 1299988800. Its totient is φ = 216580200.

The previous prime is 649867489. The next prime is 649867513. The reversal of 649867494 is 494768946.

649867494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 45969 + ... + 58419.

It is an arithmetic number, because the mean of its divisors is an integer number (81249300).

Almost surely, 2^649867494 is an apocalyptic number.

649867494 is an abundant number, since it is smaller than the sum of its proper divisors (650121306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649867494 is a wasteful number, since it uses less digits than its factorization.

649867494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21155.

The product of its digits is 10450944, while the sum is 57.

The square root of 649867494 is about 25492.4987790526. The cubic root of 649867494 is about 866.1802388386.

The spelling of 649867494 in words is "six hundred forty-nine million, eight hundred sixty-seven thousand, four hundred ninety-four".