648201866478 has 32 divisors (see below), whose sum is σ = 1324801488384. Its totient is φ = 211339987392.

The previous prime is 648201866449. The next prime is 648201866497. The reversal of 648201866478 is 874668102846.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247575 + ... + 1165202.

It is an arithmetic number, because the mean of its divisors is an integer number (41400046512).

Almost surely, 2^648201866478 is an apocalyptic number.

648201866478 is an abundant number, since it is smaller than the sum of its proper divisors (676599621906).

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

648201866478 is a wasteful number, since it uses less digits than its factorization.

648201866478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414456.

The product of its (nonzero) digits is 24772608, while the sum is 60.

The spelling of 648201866478 in words is "six hundred forty-eight billion, two hundred one million, eight hundred sixty-six thousand, four hundred seventy-eight".