1555156611168 has 96 divisors (see below), whose sum is σ = 4151731739904. Its totient is φ = 509598853632.

The previous prime is 1555156611167. The next prime is 1555156611181. The reversal of 1555156611168 is 8611166515551.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 1555156611168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555156611161) 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 15 ways as a sum of consecutive naturals, for example, 2884146 + ... + 3380622.

It is an arithmetic number, because the mean of its divisors is an integer number (43247205624).

Almost surely, 2^{1555156611168} 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 1555156611168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2075865869952).

1555156611168 is an abundant number, since it is smaller than the sum of its proper divisors (2596575128736).

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

1555156611168 is a wasteful number, since it uses less digits than its factorization.

1555156611168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497044 (or 497036 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 51.

The spelling of 1555156611168 in words is "one trillion, five hundred fifty-five billion, one hundred fifty-six million, six hundred eleven thousand, one hundred sixty-eight".