5555495721 has 16 divisors (see below), whose sum is σ = 7614804800. Its totient is φ = 3600116928.

The previous prime is 5555495719. The next prime is 5555495753. The reversal of 5555495721 is 1275945555.

It is not a de Polignac number, because 5555495721 - 2¹ = 5555495719 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5555495791) 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 15 ways as a sum of consecutive naturals, for example, 95250 + ... + 142068.

It is an arithmetic number, because the mean of its divisors is an integer number (475925300).

Almost surely, 2^5555495721 is an apocalyptic number.

It is an amenable number.

5555495721 is a deficient number, since it is larger than the sum of its proper divisors (2059309079).

5555495721 is a wasteful number, since it uses less digits than its factorization.

5555495721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47928.

The product of its digits is 1575000, while the sum is 48.

The square root of 5555495721 is about 74535.1978665114. The cubic root of 5555495721 is about 1771.0912569112.

It can be divided in two parts, 555549 and 5721, that added together give a triangular number (561270 = T₁₀₅₉).

The spelling of 5555495721 in words is "five billion, five hundred fifty-five million, four hundred ninety-five thousand, seven hundred twenty-one".