6555611556156 has 72 divisors (see below), whose sum is σ = 16567182407664. Its totient is φ = 2016673351680.

The previous prime is 6555611556149. The next prime is 6555611556157. The reversal of 6555611556156 is 6516551165556.

It is a junction number, because it is equal to n+sod(n) for n = 6555611556096 and 6555611556105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555611556157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9055276 + ... + 9752396.

It is an arithmetic number, because the mean of its divisors is an integer number (230099755662).

Almost surely, 2^{6555611556156} 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 6555611556156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8283591203832).

6555611556156 is an abundant number, since it is smaller than the sum of its proper divisors (10011570851508).

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

6555611556156 is a wasteful number, since it uses less digits than its factorization.

6555611556156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701791 (or 701776 counting only the distinct ones).

The product of its digits is 20250000, while the sum is 57.

The spelling of 6555611556156 in words is "six trillion, five hundred fifty-five billion, six hundred eleven million, five hundred fifty-six thousand, one hundred fifty-six".