648578679 has 32 divisors (see below), whose sum is σ = 1091957760. Its totient is φ = 333645312.

The previous prime is 648578669. The next prime is 648578701. The reversal of 648578679 is 976875846.

648578679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648578679 - 2¹² = 648574583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648578659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31284 + ... + 47705.

It is an arithmetic number, because the mean of its divisors is an integer number (34123680).

Almost surely, 2^648578679 is an apocalyptic number.

648578679 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

648578679 is a deficient number, since it is larger than the sum of its proper divisors (443379081).

648578679 is a wasteful number, since it uses less digits than its factorization.

648578679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79039.

The product of its digits is 20321280, while the sum is 60.

The square root of 648578679 is about 25467.2079152780. The cubic root of 648578679 is about 865.6072579941.

It can be divided in two parts, 64857 and 8679, that added together give a triangular number (73536 = T₃₈₃).

The spelling of 648578679 in words is "six hundred forty-eight million, five hundred seventy-eight thousand, six hundred seventy-nine".