75561016557 has 16 divisors (see below), whose sum is σ = 111997803008. Its totient is φ = 44999115840.

The previous prime is 75561016537. The next prime is 75561016591.

75561016557 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 75561016557 - 2¹¹ = 75561014509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75561016537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31248178 + ... + 31250595.

It is an arithmetic number, because the mean of its divisors is an integer number (6999862688).

Almost surely, 2^75561016557 is an apocalyptic number.

It is an amenable number.

75561016557 is a deficient number, since it is larger than the sum of its proper divisors (36436786451).

75561016557 is a wasteful number, since it uses less digits than its factorization.

75561016557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62498820.

The product of its (nonzero) digits is 1102500, while the sum is 48.

The spelling of 75561016557 in words is "seventy-five billion, five hundred sixty-one million, sixteen thousand, five hundred fifty-seven".