55919479729 has 9 divisors (see below), whose sum is σ = 56576141377. Its totient is φ = 55270361344.

The previous prime is 55919479697. The next prime is 55919479739. The reversal of 55919479729 is 92797491955.

The square root of 55919479729 is 236473.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1745986225 + 54173493504 = 41785^2 + 232752^2 .

It is not a de Polignac number, because 55919479729 - 2⁵ = 55919479697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55919479739) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 21044769 + ... + 21047425.

Almost surely, 2^55919479729 is an apocalyptic number.

55919479729 is the 236473-rd square number.

55919479729 is the 118237-th centered octagonal number.

It is an amenable number.

55919479729 is a deficient number, since it is larger than the sum of its proper divisors (656661648).

55919479729 is an frugal number, since it uses more digits than its factorization.

55919479729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492 (or 2746 counting only the distinct ones).

The product of its digits is 64297800, while the sum is 67.

The spelling of 55919479729 in words is "fifty-five billion, nine hundred nineteen million, four hundred seventy-nine thousand, seven hundred twenty-nine".