648681246 has 24 divisors (see below), whose sum is σ = 1417918320. Its totient is φ = 214312896.

The previous prime is 648681239. The next prime is 648681247. The reversal of 648681246 is 642186846.

648681246 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×648681246² = 841574717824225032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648681247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157426 + ... + 161493.

It is an arithmetic number, because the mean of its divisors is an integer number (59079930).

Almost surely, 2^648681246 is an apocalyptic number.

648681246 is an abundant number, since it is smaller than the sum of its proper divisors (769237074).

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

648681246 is a wasteful number, since it uses less digits than its factorization.

648681246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319040 (or 319037 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 648681246 is about 25469.2215428741. The cubic root of 648681246 is about 865.6528849745.

The spelling of 648681246 in words is "six hundred forty-eight million, six hundred eighty-one thousand, two hundred forty-six".