648205269366 has 16 divisors (see below), whose sum is σ = 1302991305264. Its totient is φ = 214971628704.

The previous prime is 648205269347. The next prime is 648205269391. The reversal of 648205269366 is 663962502846.

It is a Curzon number.

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, 274197325 + ... + 274199688.

It is an arithmetic number, because the mean of its divisors is an integer number (81436956579).

Almost surely, 2^648205269366 is an apocalyptic number.

648205269366 is an abundant number, since it is smaller than the sum of its proper divisors (654786035898).

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

648205269366 is a wasteful number, since it uses less digits than its factorization.

648205269366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548397215.

The product of its (nonzero) digits is 22394880, while the sum is 57.

The spelling of 648205269366 in words is "six hundred forty-eight billion, two hundred five million, two hundred sixty-nine thousand, three hundred sixty-six".