155205315320 has 32 divisors (see below), whose sum is σ = 380958502320. Its totient is φ = 56438296320.

The previous prime is 155205315253. The next prime is 155205315337. The reversal of 155205315320 is 23513502551.

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, 176369237 + ... + 176370116.

Almost surely, 2^155205315320 is an apocalyptic number.

155205315320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155205315320 is an abundant number, since it is smaller than the sum of its proper divisors (225753187000).

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

155205315320 is a wasteful number, since it uses less digits than its factorization.

155205315320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352739375 (or 352739371 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

Adding to 155205315320 its reverse (23513502551), we get a palindrome (178718817871).

The spelling of 155205315320 in words is "one hundred fifty-five billion, two hundred five million, three hundred fifteen thousand, three hundred twenty".