477721664 has 28 divisors (see below), whose sum is σ = 1083405504. Its totient is φ = 204737664.

The previous prime is 477721663. The next prime is 477721711. The reversal of 477721664 is 466127774.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (477721663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532724 + ... + 533619.

Almost surely, 2^477721664 is an apocalyptic number.

It is an amenable number.

477721664 is an abundant number, since it is smaller than the sum of its proper divisors (605683840).

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

477721664 is a wasteful number, since it uses less digits than its factorization.

477721664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066362 (or 1066352 counting only the distinct ones).

The product of its digits is 395136, while the sum is 44.

The square root of 477721664 is about 21856.8447860161. The cubic root of 477721664 is about 781.7327597249.

The spelling of 477721664 in words is "four hundred seventy-seven million, seven hundred twenty-one thousand, six hundred sixty-four".