648873650 has 12 divisors (see below), whose sum is σ = 1206905082. Its totient is φ = 259549440.

The previous prime is 648873613. The next prime is 648873661. The reversal of 648873650 is 56378846.

It can be written as a sum of positive squares in 3 ways, for example, as 427786489 + 221087161 = 20683^2 + 14869^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 648873595 and 648873604.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6488687 + ... + 6488786.

Almost surely, 2^648873650 is an apocalyptic number.

648873650 is a deficient number, since it is larger than the sum of its proper divisors (558031432).

648873650 is a wasteful number, since it uses less digits than its factorization.

648873650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12977485 (or 12977480 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 648873650 is about 25472.9984493385. The cubic root of 648873650 is about 865.7384630167.

The spelling of 648873650 in words is "six hundred forty-eight million, eight hundred seventy-three thousand, six hundred fifty".