155381158368 has 144 divisors (see below), whose sum is σ = 448498814400. Its totient is φ = 51020513280.

The previous prime is 155381158327. The next prime is 155381158369. The reversal of 155381158368 is 863851183551.

155381158368 is a `hidden beast` number, since 1 + 5 + 53 + 8 + 1 + 1 + 583 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155381158369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6935088 + ... + 6957456.

It is an arithmetic number, because the mean of its divisors is an integer number (3114575100).

Almost surely, 2^155381158368 is an apocalyptic number.

155381158368 is a gapful number since it is divisible by the number (18) 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 155381158368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224249407200).

155381158368 is an abundant number, since it is smaller than the sum of its proper divisors (293117656032).

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

155381158368 is a wasteful number, since it uses less digits than its factorization.

155381158368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22745 (or 22734 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 54.

The spelling of 155381158368 in words is "one hundred fifty-five billion, three hundred eighty-one million, one hundred fifty-eight thousand, three hundred sixty-eight".