155975072 has 72 divisors (see below), whose sum is σ = 344064672. Its totient is φ = 69014400.

The previous prime is 155975059. The next prime is 155975087. The reversal of 155975072 is 270579551.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1974329 + ... + 1974407.

It is an arithmetic number, because the mean of its divisors is an integer number (4778676).

Almost surely, 2^155975072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155975072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172032336).

155975072 is an abundant number, since it is smaller than the sum of its proper divisors (188089600).

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

155975072 is an equidigital number, since it uses as much as digits as its factorization.

155975072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 110250, while the sum is 41.

The square root of 155975072 is about 12488.9980382735. The cubic root of 155975072 is about 538.2925860223.

The spelling of 155975072 in words is "one hundred fifty-five million, nine hundred seventy-five thousand, seventy-two".