523044121540 has 72 divisors (see below), whose sum is σ = 1131705895320. Its totient is φ = 203048262144.

The previous prime is 523044121531. The next prime is 523044121559. The reversal of 523044121540 is 45121440325.

It can be written as a sum of positive squares in 4 ways, for example, as 36713625664 + 486330495876 = 191608^2 + 697374^2 .

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, 5760816 + ... + 5850904.

It is an arithmetic number, because the mean of its divisors is an integer number (15718137435).

Almost surely, 2^523044121540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523044121540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565852947660).

523044121540 is an abundant number, since it is smaller than the sum of its proper divisors (608661773780).

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

523044121540 is a wasteful number, since it uses less digits than its factorization.

523044121540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90341 (or 90296 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 523044121540 its reverse (45121440325), we get a palindrome (568165561865).

The spelling of 523044121540 in words is "five hundred twenty-three billion, forty-four million, one hundred twenty-one thousand, five hundred forty".