1800539745 has 16 divisors (see below), whose sum is σ = 2928092352. Its totient is φ = 944544960.

The previous prime is 1800539743. The next prime is 1800539749. The reversal of 1800539745 is 5479350081.

It is not a de Polignac number, because 1800539745 - 2¹ = 1800539743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1800539697 and 1800539706.

It is not an unprimeable number, because it can be changed into a prime (1800539743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982987 + ... + 984816.

It is an arithmetic number, because the mean of its divisors is an integer number (183005772).

Almost surely, 2^1800539745 is an apocalyptic number.

1800539745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1800539745 is a deficient number, since it is larger than the sum of its proper divisors (1127552607).

1800539745 is a wasteful number, since it uses less digits than its factorization.

1800539745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967872.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1800539745 is about 42432.7673502448. The cubic root of 1800539745 is about 1216.5619735607.

The spelling of 1800539745 in words is "one billion, eight hundred million, five hundred thirty-nine thousand, seven hundred forty-five".