155727211072 has 56 divisors (see below), whose sum is σ = 314155104480. Its totient is φ = 76580505600.

The previous prime is 155727210971. The next prime is 155727211093. The reversal of 155727211072 is 270112727551.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870072 + ... + 1033672.

It is an arithmetic number, because the mean of its divisors is an integer number (5609912580).

Almost surely, 2^155727211072 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 155727211072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157077552240).

155727211072 is an abundant number, since it is smaller than the sum of its proper divisors (158427893408).

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

155727211072 is a wasteful number, since it uses less digits than its factorization.

155727211072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163859 (or 163849 counting only the distinct ones).

The product of its (nonzero) digits is 68600, while the sum is 40.

The spelling of 155727211072 in words is "one hundred fifty-five billion, seven hundred twenty-seven million, two hundred eleven thousand, seventy-two".