155561166060 has 144 divisors (see below), whose sum is σ = 453031488000. Its totient is φ = 39881854208.

The previous prime is 155561166037. The next prime is 155561166077. The reversal of 155561166060 is 60661165551.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12053491 + ... + 12066389.

It is an arithmetic number, because the mean of its divisors is an integer number (3146052000).

Almost surely, 2^155561166060 is an apocalyptic number.

155561166060 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 155561166060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226515744000).

155561166060 is an abundant number, since it is smaller than the sum of its proper divisors (297470321940).

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

155561166060 is a wasteful number, since it uses less digits than its factorization.

155561166060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13208 (or 13177 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 155561166060 in words is "one hundred fifty-five billion, five hundred sixty-one million, one hundred sixty-six thousand, sixty".