1555156661160 has 128 divisors (see below), whose sum is σ = 4697064028800. Its totient is φ = 411905556480.

The previous prime is 1555156661159. The next prime is 1555156661173. The reversal of 1555156661160 is 611666515551.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18366120 + ... + 18450600.

It is an arithmetic number, because the mean of its divisors is an integer number (36695812725).

Almost surely, 2^{1555156661160} is an apocalyptic number.

1555156661160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1555156661160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2348532014400).

1555156661160 is an abundant number, since it is smaller than the sum of its proper divisors (3141907367640).

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

1555156661160 is a wasteful number, since it uses less digits than its factorization.

1555156661160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85531 (or 85527 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 1555156661160 in words is "one trillion, five hundred fifty-five billion, one hundred fifty-six million, six hundred sixty-one thousand, one hundred sixty".