54159994729 has 9 divisors (see below), whose sum is σ = 55213736599. Its totient is φ = 53126006440.

The previous prime is 54159994661. The next prime is 54159994753. The reversal of 54159994729 is 92749995145.

The square root of 54159994729 is 232723.

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., 39043784025 + 15116210704 = 197595^2 + 122948^2 .

It is not a de Polignac number, because 54159994729 - 2⁷ = 54159994601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54159994129) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12332124 + ... + 12336514.

Almost surely, 2^54159994729 is an apocalyptic number.

54159994729 is the 232723-rd square number.

54159994729 is the 116362-nd centered octagonal number.

It is an amenable number.

54159994729 is a deficient number, since it is larger than the sum of its proper divisors (1053741870).

54159994729 is an frugal number, since it uses more digits than its factorization.

54159994729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8888 (or 4444 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 64.

Multiplying 54159994729 by its sum of digits (64), we get a square (3466239662656 = 1861784²).

The spelling of 54159994729 in words is "fifty-four billion, one hundred fifty-nine million, nine hundred ninety-four thousand, seven hundred twenty-nine".