155161380 has 96 divisors (see below), whose sum is σ = 501863040. Its totient is φ = 35399680.

The previous prime is 155161291. The next prime is 155161399. The reversal of 155161380 is 83161551.

155161380 = T₄₂₆₄ + T₄₂₆₅ + ... + T₄₂₈₀.

155161380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a zygodrome in base 8.

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, 4306 + ... + 18134.

It is an arithmetic number, because the mean of its divisors is an integer number (5227740).

Almost surely, 2^155161380 is an apocalyptic number.

155161380 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 155161380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250931520).

155161380 is an abundant number, since it is smaller than the sum of its proper divisors (346701660).

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

155161380 is a wasteful number, since it uses less digits than its factorization.

155161380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13869 (or 13867 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 155161380 is about 12456.3790886437. The cubic root of 155161380 is about 537.3548971938.

The spelling of 155161380 in words is "one hundred fifty-five million, one hundred sixty-one thousand, three hundred eighty".