2028377161 has 4 divisors (see below), whose sum is σ = 2028981892. Its totient is φ = 2027772432.

The previous prime is 2028377149. The next prime is 2028377171. The reversal of 2028377161 is 1617738202.

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 1309064761 + 719312400 = 36181^2 + 26820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028377161 - 2⁷ = 2028377033 is a prime.

It is a super-2 number, since 2×2028377161² = 8228627814532839842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2028377161.

It is not an unprimeable number, because it can be changed into a prime (2028377171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297306 + ... + 304051.

It is an arithmetic number, because the mean of its divisors is an integer number (507245473).

Almost surely, 2^2028377161 is an apocalyptic number.

It is an amenable number.

2028377161 is a deficient number, since it is larger than the sum of its proper divisors (604731).

2028377161 is an equidigital number, since it uses as much as digits as its factorization.

2028377161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604730.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 2028377161 is about 45037.5083791277. The cubic root of 2028377161 is about 1265.8519179296.

The spelling of 2028377161 in words is "two billion, twenty-eight million, three hundred seventy-seven thousand, one hundred sixty-one".