1023320320045 has 8 divisors (see below), whose sum is σ = 1228809097080. Its totient is φ = 818106447360.

The previous prime is 1023320320003. The next prime is 1023320320073. The reversal of 1023320320045 is 5400230233201.

It can be written as a sum of positive squares in 4 ways, for example, as 106512155044 + 916808165001 = 326362^2 + 957501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1023320320045 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 68717896 + ... + 68732785.

It is an arithmetic number, because the mean of its divisors is an integer number (153601137135).

Almost surely, 2^{1023320320045} is an apocalyptic number.

It is an amenable number.

1023320320045 is a deficient number, since it is larger than the sum of its proper divisors (205488777035).

1023320320045 is a wasteful number, since it uses less digits than its factorization.

1023320320045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137452175.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 1023320320045 its reverse (5400230233201), we get a palindrome (6423550553246).

The spelling of 1023320320045 in words is "one trillion, twenty-three billion, three hundred twenty million, three hundred twenty thousand, forty-five".