155720166517160 has 128 divisors (see below), whose sum is σ = 409240823454720. Its totient is φ = 52215754601472.

The previous prime is 155720166517073. The next prime is 155720166517169. The reversal of 155720166517160 is 61715661027551.

It is not an unprimeable number, because it can be changed into a prime (155720166517169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13759562 + ... + 22377798.

It is an arithmetic number, because the mean of its divisors is an integer number (3197193933240).

Almost surely, 2^{155720166517160} is an apocalyptic number.

155720166517160 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 155720166517160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204620411727360).

155720166517160 is an abundant number, since it is smaller than the sum of its proper divisors (253520656937560).

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

155720166517160 is a wasteful number, since it uses less digits than its factorization.

155720166517160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8619675 (or 8619671 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 53.

The spelling of 155720166517160 in words is "one hundred fifty-five trillion, seven hundred twenty billion, one hundred sixty-six million, five hundred seventeen thousand, one hundred sixty".