54721408401664 has 27 divisors (see below), whose sum is σ = 109229297556477. Its totient is φ = 27360645021696.

The previous prime is 54721408401631. The next prime is 54721408401679. The reversal of 54721408401664 is 46610480412745.

It is a happy number.

The square root of 54721408401664 is 7397392.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 54109559046400 + 611849355264 = 7355920^2 + 782208^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 118127104 + ... + 118589440.

Almost surely, 2^{54721408401664} is an apocalyptic number.

54721408401664 is the 7397392-nd square number.

It is an amenable number.

54721408401664 is a deficient number, since it is larger than the sum of its proper divisors (54507889154813).

54721408401664 is an frugal number, since it uses more digits than its factorization.

54721408401664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924690 (or 462339 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 54721408401664 in words is "fifty-four trillion, seven hundred twenty-one billion, four hundred eight million, four hundred one thousand, six hundred sixty-four".