1849774081 has 9 divisors (see below), whose sum is σ = 1897800073. Its totient is φ = 1802937280.

The previous prime is 1849774079. The next prime is 1849774093. The reversal of 1849774081 is 1804779481.

The square root of 1849774081 is 43009.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 14508481 + 1835265600 = 3809^2 + 42840^2 .

It is not a de Polignac number, because 1849774081 - 2¹ = 1849774079 is a prime.

It is a super-2 number, since 2×1849774081² = 6843328301478789122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1849774181) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1762845 + ... + 1763893.

Almost surely, 2^1849774081 is an apocalyptic number.

1849774081 is the 43009-th square number.

1849774081 is the 21505-th centered octagonal number.

It is an amenable number.

1849774081 is a deficient number, since it is larger than the sum of its proper divisors (48025992).

1849774081 is an frugal number, since it uses more digits than its factorization.

1849774081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 49.

The cubic root of 1849774081 is about 1227.5510532757.

Multiplying 1849774081 by its sum of digits (49), we get a square (90638929969 = 301063²).

Multiplying 1849774081 by its product of nonzero digits (451584), we get a square (835328378594304 = 28902048²).

The spelling of 1849774081 in words is "one billion, eight hundred forty-nine million, seven hundred seventy-four thousand, eighty-one".