1899294545 has 16 divisors (see below), whose sum is σ = 2342243088. Its totient is φ = 1477428480.

The previous prime is 1899294539. The next prime is 1899294583. The reversal of 1899294545 is 5454929981.

It can be written as a sum of positive squares in 8 ways, for example, as 436308544 + 1462986001 = 20888^2 + 38249^2 .

It is not a de Polignac number, because 1899294545 - 2²⁰ = 1898245969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482927 + ... + 486843.

It is an arithmetic number, because the mean of its divisors is an integer number (146390193).

Almost surely, 2^1899294545 is an apocalyptic number.

It is an amenable number.

1899294545 is a deficient number, since it is larger than the sum of its proper divisors (442948543).

1899294545 is a wasteful number, since it uses less digits than its factorization.

1899294545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6580.

The product of its digits is 4665600, while the sum is 56.

The square root of 1899294545 is about 43580.8965603050. The cubic root of 1899294545 is about 1238.4090211829.

The spelling of 1899294545 in words is "one billion, eight hundred ninety-nine million, two hundred ninety-four thousand, five hundred forty-five".