155320443134400 has 168 divisors, whose sum is σ = 509591854641024. Its totient is φ = 41417860889600.

The previous prime is 155320443134399. The next prime is 155320443134477. The reversal of 155320443134400 is 4431344023551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230173495 + ... + 230847305.

Almost surely, 2^{155320443134400} is an apocalyptic number.

155320443134400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155320443134400 is an abundant number, since it is smaller than the sum of its proper divisors (354271411506624).

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

155320443134400 is a wasteful number, since it uses less digits than its factorization.

155320443134400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721859 (or 721844 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 155320443134400 its reverse (4431344023551), we get a palindrome (159751787157951).

The spelling of 155320443134400 in words is "one hundred fifty-five trillion, three hundred twenty billion, four hundred forty-three million, one hundred thirty-four thousand, four hundred".