648623678 has 16 divisors (see below), whose sum is σ = 1031803920. Its totient is φ = 304749696.

The previous prime is 648623663. The next prime is 648623681. The reversal of 648623678 is 876326846.

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, 7028 + ... + 36696.

It is an arithmetic number, because the mean of its divisors is an integer number (64487745).

Almost surely, 2^648623678 is an apocalyptic number.

648623678 is a deficient number, since it is larger than the sum of its proper divisors (383180242).

648623678 is a wasteful number, since it uses less digits than its factorization.

648623678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30331.

The product of its digits is 2322432, while the sum is 50.

The square root of 648623678 is about 25468.0913693979. The cubic root of 648623678 is about 865.6272764136.

The spelling of 648623678 in words is "six hundred forty-eight million, six hundred twenty-three thousand, six hundred seventy-eight".