1023716665145 has 4 divisors (see below), whose sum is σ = 1228459998180. Its totient is φ = 818973332112.

The previous prime is 1023716665133. The next prime is 1023716665211. The reversal of 1023716665145 is 5415666173201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 587933165824 + 435783499321 = 766768^2 + 660139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023716665145 - 2¹⁸ = 1023716403001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1023716665145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102371666510 + ... + 102371666519.

It is an arithmetic number, because the mean of its divisors is an integer number (307114999545).

Almost surely, 2^{1023716665145} is an apocalyptic number.

It is an amenable number.

1023716665145 is a deficient number, since it is larger than the sum of its proper divisors (204743333035).

1023716665145 is an equidigital number, since it uses as much as digits as its factorization.

1023716665145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204743333034.

The product of its (nonzero) digits is 907200, while the sum is 47.

It can be divided in two parts, 1023716 and 665145, that added together give a palindrome (1688861).

The spelling of 1023716665145 in words is "one trillion, twenty-three billion, seven hundred sixteen million, six hundred sixty-five thousand, one hundred forty-five".