654051321664 has 56 divisors (see below), whose sum is σ = 1403988454400. Its totient is φ = 300516079104.

The previous prime is 654051321631. The next prime is 654051321709. The reversal of 654051321664 is 466123150456.

It is a self number, because there is not a number n which added to its sum of digits gives 654051321664.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577064 + ... + 1948135.

It is an arithmetic number, because the mean of its divisors is an integer number (25071222400).

Almost surely, 2^654051321664 is an apocalyptic number.

654051321664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

654051321664 is an abundant number, since it is smaller than the sum of its proper divisors (749937132736).

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

654051321664 is a wasteful number, since it uses less digits than its factorization.

654051321664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525447 (or 3525437 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 654051321664 in words is "six hundred fifty-four billion, fifty-one million, three hundred twenty-one thousand, six hundred sixty-four".