6557846487556 has 96 divisors (see below), whose sum is σ = 14332056883200. Its totient is φ = 2556250704000.

The previous prime is 6557846487547. The next prime is 6557846487557.

6557846487556 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (6557846487557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43834281 + ... + 43983631.

It is an arithmetic number, because the mean of its divisors is an integer number (149292259200).

Almost surely, 2^{6557846487556} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6557846487556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7166028441600).

6557846487556 is an abundant number, since it is smaller than the sum of its proper divisors (7774210395644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6557846487556 is a wasteful number, since it uses less digits than its factorization.

6557846487556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151145 (or 151143 counting only the distinct ones).

The product of its digits is 6773760000, while the sum is 76.

The spelling of 6557846487556 in words is "six trillion, five hundred fifty-seven billion, eight hundred forty-six million, four hundred eighty-seven thousand, five hundred fifty-six".