1173315320520 has 128 divisors (see below), whose sum is σ = 4027758013440. Its totient is φ = 267855517440.

The previous prime is 1173315320519. The next prime is 1173315320531. The reversal of 1173315320520 is 250235133711.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179922 + ... + 1542401.

It is an arithmetic number, because the mean of its divisors is an integer number (31466859480).

Almost surely, 2^{1173315320520} is an apocalyptic number.

1173315320520 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 1173315320520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013879006720).

1173315320520 is an abundant number, since it is smaller than the sum of its proper divisors (2854442692920).

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

1173315320520 is a wasteful number, since it uses less digits than its factorization.

1173315320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723155 (or 1723151 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The spelling of 1173315320520 in words is "one trillion, one hundred seventy-three billion, three hundred fifteen million, three hundred twenty thousand, five hundred twenty".