75549894557 has 4 divisors (see below), whose sum is σ = 75559094880. Its totient is φ = 75540694236.

The previous prime is 75549894509. The next prime is 75549894569.

75549894557 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75549894557 - 2¹⁸ = 75549632413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75549894587) 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, 4587833 + ... + 4604270.

It is an arithmetic number, because the mean of its divisors is an integer number (18889773720).

Almost surely, 2^75549894557 is an apocalyptic number.

It is an amenable number.

75549894557 is a deficient number, since it is larger than the sum of its proper divisors (9200323).

75549894557 is an equidigital number, since it uses as much as digits as its factorization.

75549894557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200322.

The product of its digits is 317520000, while the sum is 68.

The spelling of 75549894557 in words is "seventy-five billion, five hundred forty-nine million, eight hundred ninety-four thousand, five hundred fifty-seven".