1649874856 has 32 divisors (see below), whose sum is σ = 3537492480. Its totient is φ = 706680000.

The previous prime is 1649874851. The next prime is 1649874857. The reversal of 1649874856 is 6584789461.

It is a super-2 number, since 2×1649874856² = 5444174080922041472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1649874856.

It is not an unprimeable number, because it can be changed into a prime (1649874851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101706 + ... + 116806.

It is an arithmetic number, because the mean of its divisors is an integer number (110546640).

Almost surely, 2^1649874856 is an apocalyptic number.

It is an amenable number.

1649874856 is an abundant number, since it is smaller than the sum of its proper divisors (1887617624).

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

1649874856 is a wasteful number, since it uses less digits than its factorization.

1649874856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17065 (or 17061 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 58.

The square root of 1649874856 is about 40618.6515778158. The cubic root of 1649874856 is about 1181.6358752923.

The spelling of 1649874856 in words is "one billion, six hundred forty-nine million, eight hundred seventy-four thousand, eight hundred fifty-six".