155227730112 has 672 divisors, whose sum is σ = 574617738240. Its totient is φ = 38940549120.

The previous prime is 155227730093. The next prime is 155227730191. The reversal of 155227730112 is 211037722551.

155227730112 is a `hidden beast` number, since 1 + 552 + 2 + 77 + 30 + 1 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 399042814 + ... + 399043202.

It is an arithmetic number, because the mean of its divisors is an integer number (855085920).

Almost surely, 2^155227730112 is an apocalyptic number.

155227730112 is a gapful number since it is divisible by the number (12) 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 155227730112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287308869120).

155227730112 is an abundant number, since it is smaller than the sum of its proper divisors (419390008128).

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

155227730112 is a wasteful number, since it uses less digits than its factorization.

155227730112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The spelling of 155227730112 in words is "one hundred fifty-five billion, two hundred twenty-seven million, seven hundred thirty thousand, one hundred twelve".