155127861018 has 40 divisors (see below), whose sum is σ = 374339886228. Its totient is φ = 47731648896.

The previous prime is 155127861011. The next prime is 155127861043. The reversal of 155127861018 is 810168721551.

155127861018 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 27 + 8 + 610 + 1 + 8 = 666.

155127861018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 151634696409 + 3493164609 = 389403^2 + 59103^2 .

It is not an unprimeable number, because it can be changed into a prime (155127861011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36827871 + ... + 36832082.

Almost surely, 2^155127861018 is an apocalyptic number.

155127861018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

155127861018 is an abundant number, since it is smaller than the sum of its proper divisors (219212025210).

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

155127861018 is a wasteful number, since it uses less digits than its factorization.

155127861018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73659980 (or 73659971 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 45.

The spelling of 155127861018 in words is "one hundred fifty-five billion, one hundred twenty-seven million, eight hundred sixty-one thousand, eighteen".