155773072 has 80 divisors (see below), whose sum is σ = 376225920. Its totient is φ = 60834816.

The previous prime is 155773067. The next prime is 155773117. The reversal of 155773072 is 270377551.

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, 120204 + ... + 121492.

It is an arithmetic number, because the mean of its divisors is an integer number (4702824).

Almost surely, 2^155773072 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 155773072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188112960).

155773072 is an abundant number, since it is smaller than the sum of its proper divisors (220452848).

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

155773072 is a wasteful number, since it uses less digits than its factorization.

155773072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 37.

The square root of 155773072 is about 12480.9083002801. The cubic root of 155773072 is about 538.0601085395.

The spelling of 155773072 in words is "one hundred fifty-five million, seven hundred seventy-three thousand, seventy-two".