1205342745450 has 96 divisors (see below), whose sum is σ = 3001520836800. Its totient is φ = 320106232320.

The previous prime is 1205342745421. The next prime is 1205342745527. The reversal of 1205342745450 is 545472435021.

It is a happy number.

It is a super-2 number, since 2×1205342745450² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158531349 + ... + 158538951.

It is an arithmetic number, because the mean of its divisors is an integer number (31265842050).

Almost surely, 2^{1205342745450} is an apocalyptic number.

1205342745450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205342745450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500760418400).

1205342745450 is an abundant number, since it is smaller than the sum of its proper divisors (1796178091350).

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

1205342745450 is a wasteful number, since it uses less digits than its factorization.

1205342745450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11816 (or 11811 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 42.

The spelling of 1205342745450 in words is "one trillion, two hundred five billion, three hundred forty-two million, seven hundred forty-five thousand, four hundred fifty".