155123000320000 has 280 divisors, whose sum is σ = 388902287272356. Its totient is φ = 61850320896000.

The previous prime is 155123000319983. The next prime is 155123000320019. The reversal of 155123000320000 is 23000321551.

It can be written as a sum of positive squares in 10 ways, for example, as 38818681655296 + 116304318664704 = 6230464^2 + 10784448^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1602511602 + ... + 1602608398.

Almost surely, 2^{155123000320000} is an apocalyptic number.

155123000320000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155123000320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194451143636178).

155123000320000 is an abundant number, since it is smaller than the sum of its proper divisors (233779286952356).

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

155123000320000 is an frugal number, since it uses more digits than its factorization.

155123000320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97156 (or 97117 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 155123000320000 its reverse (23000321551), we get a palindrome (155146000641551).

The spelling of 155123000320000 in words is "one hundred fifty-five trillion, one hundred twenty-three billion, three hundred twenty thousand".