1555056561006 has 96 divisors (see below), whose sum is σ = 3683397594240. Its totient is φ = 471238143552.

The previous prime is 1555056560999. The next prime is 1555056561007. The reversal of 1555056561006 is 6001656505551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555056561007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114176065 + ... + 114189683.

It is an arithmetic number, because the mean of its divisors is an integer number (38368724940).

Almost surely, 2^{1555056561006} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1555056561006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1841698797120).

1555056561006 is an abundant number, since it is smaller than the sum of its proper divisors (2128341033234).

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

1555056561006 is a wasteful number, since it uses less digits than its factorization.

1555056561006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20990 (or 20987 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 1555056561006 in words is "one trillion, five hundred fifty-five billion, fifty-six million, five hundred sixty-one thousand, six".