1864120745 has 4 divisors (see below), whose sum is σ = 2236944900. Its totient is φ = 1491296592.

The previous prime is 1864120733. The next prime is 1864120789. The reversal of 1864120745 is 5470214681.

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 276257641 + 1587863104 = 16621^2 + 39848^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864120745 - 2⁶ = 1864120681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1864120699 and 1864120708.

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 3 ways as a sum of consecutive naturals, for example, 186412070 + ... + 186412079.

It is an arithmetic number, because the mean of its divisors is an integer number (559236225).

Almost surely, 2^1864120745 is an apocalyptic number.

It is an amenable number.

1864120745 is a deficient number, since it is larger than the sum of its proper divisors (372824155).

1864120745 is an equidigital number, since it uses as much as digits as its factorization.

1864120745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372824154.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1864120745 is about 43175.4646182296. The cubic root of 1864120745 is about 1230.7164717734.

The spelling of 1864120745 in words is "one billion, eight hundred sixty-four million, one hundred twenty thousand, seven hundred forty-five".