54511606531621 has 4 divisors (see below), whose sum is σ = 55405239425644. Its totient is φ = 53617973637600.

The previous prime is 54511606531607. The next prime is 54511606531667. The reversal of 54511606531621 is 12613560611545.

54511606531621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26168227709121 + 28343378822500 = 5115489^2 + 5323850^2 .

It is a cyclic number.

It is not a de Polignac number, because 54511606531621 - 2⁵ = 54511606531589 is a prime.

It is a super-4 number, since 4×54511606531621⁴ (a number of 56 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54511606535621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446816446920 + ... + 446816447041.

It is an arithmetic number, because the mean of its divisors is an integer number (13851309856411).

Almost surely, 2^{54511606531621} is an apocalyptic number.

It is an amenable number.

54511606531621 is a deficient number, since it is larger than the sum of its proper divisors (893632894023).

54511606531621 is an equidigital number, since it uses as much as digits as its factorization.

54511606531621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893632894022.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 54511606531621 in words is "fifty-four trillion, five hundred eleven billion, six hundred six million, five hundred thirty-one thousand, six hundred twenty-one".