7556542456557 has 4 divisors (see below), whose sum is σ = 10075389942080. Its totient is φ = 5037694971036.

The previous prime is 7556542456513. The next prime is 7556542456579.

It is a happy number.

7556542456557 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 not a de Polignac number, because 7556542456557 - 2¹⁰ = 7556542455533 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 (7556542456357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259423742757 + ... + 1259423742762.

It is an arithmetic number, because the mean of its divisors is an integer number (2518847485520).

Almost surely, 2^{7556542456557} is an apocalyptic number.

It is an amenable number.

7556542456557 is a deficient number, since it is larger than the sum of its proper divisors (2518847485523).

7556542456557 is a wasteful number, since it uses less digits than its factorization.

7556542456557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518847485522.

The product of its digits is 882000000, while the sum is 66.

The spelling of 7556542456557 in words is "seven trillion, five hundred fifty-six billion, five hundred forty-two million, four hundred fifty-six thousand, five hundred fifty-seven".