155945018220 has 24 divisors (see below), whose sum is σ = 436646051184. Its totient is φ = 41585338176.

The previous prime is 155945018191. The next prime is 155945018221. The reversal of 155945018220 is 22810549551.

155945018220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155945018220² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155945018221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299541759 + ... + 1299541878.

It is an arithmetic number, because the mean of its divisors is an integer number (18193585466).

Almost surely, 2^155945018220 is an apocalyptic number.

155945018220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155945018220 is an abundant number, since it is smaller than the sum of its proper divisors (280701032964).

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

155945018220 is a wasteful number, since it uses less digits than its factorization.

155945018220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599083649 (or 2599083647 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 42.

The spelling of 155945018220 in words is "one hundred fifty-five billion, nine hundred forty-five million, eighteen thousand, two hundred twenty".