1819711445 has 8 divisors (see below), whose sum is σ = 2205274680. Its totient is φ = 1441355200.

The previous prime is 1819711429. The next prime is 1819711457. The reversal of 1819711445 is 5441179181.

It can be written as a sum of positive squares in 4 ways, for example, as 289884676 + 1529826769 = 17026^2 + 39113^2 .

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

It is not a de Polignac number, because 1819711445 - 2⁴ = 1819711429 is a prime.

It is a super-2 number, since 2×1819711445² = 6622699486127976050, which contains 22 as substring.

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, 1801190 + ... + 1802199.

It is an arithmetic number, because the mean of its divisors is an integer number (275659335).

Almost surely, 2^1819711445 is an apocalyptic number.

It is an amenable number.

1819711445 is a deficient number, since it is larger than the sum of its proper divisors (385563235).

1819711445 is a wasteful number, since it uses less digits than its factorization.

1819711445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603495.

The product of its digits is 40320, while the sum is 41.

The square root of 1819711445 is about 42658.0759645814. The cubic root of 1819711445 is about 1220.8646215725.

The spelling of 1819711445 in words is "one billion, eight hundred nineteen million, seven hundred eleven thousand, four hundred forty-five".