155945520 has 320 divisors, whose sum is σ = 581391360. Its totient is φ = 38320128.

The previous prime is 155945501. The next prime is 155945551. The reversal of 155945520 is 25549551.

155945520 is a `hidden beast` number, since 15 + 5 + 94 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2136204 + ... + 2136276.

It is an arithmetic number, because the mean of its divisors is an integer number (1816848).

Almost surely, 2^155945520 is an apocalyptic number.

155945520 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 155945520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290695680).

155945520 is an abundant number, since it is smaller than the sum of its proper divisors (425445840).

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

155945520 is a wasteful number, since it uses less digits than its factorization.

155945520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 155945520 is about 12487.8148608954. The cubic root of 155945520 is about 538.2585877963.

The spelling of 155945520 in words is "one hundred fifty-five million, nine hundred forty-five thousand, five hundred twenty".