6557348437556 has 96 divisors (see below), whose sum is σ = 14019895169280. Its totient is φ = 2624041728000.

The previous prime is 6557348437553. The next prime is 6557348437649.

6557348437556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6557348437556² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557348437553) 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, 2596796 + ... + 4456236.

It is an arithmetic number, because the mean of its divisors is an integer number (146040574680).

Almost surely, 2^{6557348437556} 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 6557348437556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7009947584640).

6557348437556 is an abundant number, since it is smaller than the sum of its proper divisors (7462546731724).

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

6557348437556 is a wasteful number, since it uses less digits than its factorization.

6557348437556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859625 (or 1859623 counting only the distinct ones).

The product of its digits is 1270080000, while the sum is 68.

The spelling of 6557348437556 in words is "six trillion, five hundred fifty-seven billion, three hundred forty-eight million, four hundred thirty-seven thousand, five hundred fifty-six".