1044120661520 has 80 divisors (see below), whose sum is σ = 2473699195440. Its totient is φ = 409715884032.

The previous prime is 1044120661471. The next prime is 1044120661537. The reversal of 1044120661520 is 251660214401.

It can be written as a sum of positive squares in 8 ways, for example, as 43104403456 + 1001016258064 = 207616^2 + 1000508^2 .

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 66004652 + ... + 66020468.

It is an arithmetic number, because the mean of its divisors is an integer number (30921239943).

Almost surely, 2^{1044120661520} is an apocalyptic number.

1044120661520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1044120661520 is an abundant number, since it is smaller than the sum of its proper divisors (1429578533920).

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

1044120661520 is a wasteful number, since it uses less digits than its factorization.

1044120661520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31452 (or 31446 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 1044120661520 its reverse (251660214401), we get a palindrome (1295780875921).

The spelling of 1044120661520 in words is "one trillion, forty-four billion, one hundred twenty million, six hundred sixty-one thousand, five hundred twenty".