155685348018 has 18 divisors (see below), whose sum is σ = 337321881117. Its totient is φ = 51894558000.

The previous prime is 155685348017. The next prime is 155685348019. The reversal of 155685348018 is 810843586551.

155685348018 is a `hidden beast` number, since 1 + 55 + 68 + 53 + 480 + 1 + 8 = 666.

155685348018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155685348017) and next prime (155685348019).

It can be written as a sum of positive squares in 2 ways, for example, as 133256391849 + 22428956169 = 365043^2 + 149763^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=279003.

It is not an unprimeable number, because it can be changed into a prime (155685348017) 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 8 ways as a sum of consecutive naturals, for example, 1627518 + ... + 1720518.

Almost surely, 2^155685348018 is an apocalyptic number.

155685348018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

155685348018 is an abundant number, since it is smaller than the sum of its proper divisors (181636533099).

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

155685348018 is an frugal number, since it uses more digits than its factorization.

155685348018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186010 (or 93006 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 54.

The spelling of 155685348018 in words is "one hundred fifty-five billion, six hundred eighty-five million, three hundred forty-eight thousand, eighteen".