155205454400000 has 240 divisors, whose sum is σ = 394923518074008. Its totient is φ = 60910786560000.

The previous prime is 155205454399987. The next prime is 155205454400063. The reversal of 155205454400000 is 4454502551.

It can be written as a sum of positive squares in 12 ways, for example, as 40882826785024 + 114322627614976 = 6393968^2 + 10692176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83884874 + ... + 85715126.

Almost surely, 2^{155205454400000} is an apocalyptic number.

155205454400000 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 155205454400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197461759037004).

155205454400000 is an abundant number, since it is smaller than the sum of its proper divisors (239718063674008).

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

155205454400000 is an frugal number, since it uses more digits than its factorization.

155205454400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830349 (or 1830313 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 155205454400000 in words is "one hundred fifty-five trillion, two hundred five billion, four hundred fifty-four million, four hundred thousand".