54128355761 has 4 divisors (see below), whose sum is σ = 54132088692. Its totient is φ = 54124622832.

The previous prime is 54128355739. The next prime is 54128355763. The reversal of 54128355761 is 16755382145.

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 11587230736 + 42541125025 = 107644^2 + 206255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54128355761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54128355763) 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 3 ways as a sum of consecutive naturals, for example, 1844630 + ... + 1873743.

It is an arithmetic number, because the mean of its divisors is an integer number (13533022173).

Almost surely, 2^54128355761 is an apocalyptic number.

It is an amenable number.

54128355761 is a deficient number, since it is larger than the sum of its proper divisors (3732931).

54128355761 is a wasteful number, since it uses less digits than its factorization.

54128355761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732930.

The product of its digits is 1008000, while the sum is 47.

The spelling of 54128355761 in words is "fifty-four billion, one hundred twenty-eight million, three hundred fifty-five thousand, seven hundred sixty-one".