1766928145 has 4 divisors (see below), whose sum is σ = 2120313780. Its totient is φ = 1413542512.

The previous prime is 1766928109. The next prime is 1766928187. The reversal of 1766928145 is 5418296671.

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 616429584 + 1150498561 = 24828^2 + 33919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1766928145 - 2¹⁹ = 1766403857 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 176692810 + ... + 176692819.

It is an arithmetic number, because the mean of its divisors is an integer number (530078445).

Almost surely, 2^1766928145 is an apocalyptic number.

It is an amenable number.

1766928145 is a deficient number, since it is larger than the sum of its proper divisors (353385635).

1766928145 is an equidigital number, since it uses as much as digits as its factorization.

1766928145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353385634.

The product of its digits is 725760, while the sum is 49.

The square root of 1766928145 is about 42034.8444150802. The cubic root of 1766928145 is about 1208.9443117781.

The spelling of 1766928145 in words is "one billion, seven hundred sixty-six million, nine hundred twenty-eight thousand, one hundred forty-five".