155061920 has 96 divisors (see below), whose sum is σ = 398297088. Its totient is φ = 56706048.

The previous prime is 155061917. The next prime is 155061953. The reversal of 155061920 is 29160551.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263867 + ... + 264453.

It is an arithmetic number, because the mean of its divisors is an integer number (4148928).

Almost surely, 2^155061920 is an apocalyptic number.

155061920 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 155061920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199148544).

155061920 is an abundant number, since it is smaller than the sum of its proper divisors (243235168).

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

155061920 is a wasteful number, since it uses less digits than its factorization.

155061920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 155061920 is about 12452.3861167248. The cubic root of 155061920 is about 537.2400560269.

The spelling of 155061920 in words is "one hundred fifty-five million, sixty-one thousand, nine hundred twenty".