155044420320 has 48 divisors (see below), whose sum is σ = 488389925520. Its totient is φ = 41345178624.

The previous prime is 155044420261. The next prime is 155044420339. The reversal of 155044420320 is 23024440551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 161504125 + ... + 161505084.

It is an arithmetic number, because the mean of its divisors is an integer number (10174790115).

Almost surely, 2^155044420320 is an apocalyptic number.

155044420320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155044420320 is an abundant number, since it is smaller than the sum of its proper divisors (333345505200).

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

155044420320 is a wasteful number, since it uses less digits than its factorization.

155044420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323009227 (or 323009219 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 155044420320 its reverse (23024440551), we get a palindrome (178068860871).

The spelling of 155044420320 in words is "one hundred fifty-five billion, forty-four million, four hundred twenty thousand, three hundred twenty".