15955447058329 has 9 divisors (see below), whose sum is σ = 16839485443263. Its totient is φ = 15115614787152.

The previous prime is 15955447058311. The next prime is 15955447058377. The reversal of 15955447058329 is 92385074455951.

The square root of 15955447058329 is 3994427.

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., 14206303265625 + 1749143792704 = 3769125^2 + 1322552^2 .

It is not a de Polignac number, because 15955447058329 - 2⁴¹ = 13756423802777 is a prime.

It is a super-4 number, since 4×15955447058329⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15955447058399) 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, 75788997 + ... + 75999229.

Almost surely, 2^{15955447058329} is an apocalyptic number.

15955447058329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

15955447058329 is the 3994427-th square number.

15955447058329 is the 1997214-th centered octagonal number.

It is an amenable number.

15955447058329 is a deficient number, since it is larger than the sum of its proper divisors (884038384934).

15955447058329 is an frugal number, since it uses more digits than its factorization.

15955447058329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420504 (or 210252 counting only the distinct ones).

The product of its (nonzero) digits is 272160000, while the sum is 67.

The spelling of 15955447058329 in words is "fifteen trillion, nine hundred fifty-five billion, four hundred forty-seven million, fifty-eight thousand, three hundred twenty-nine".