1801696385 has 4 divisors (see below), whose sum is σ = 2162035668. Its totient is φ = 1441357104.

The previous prime is 1801696349. The next prime is 1801696387. The reversal of 1801696385 is 5836961081.

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 361342081 + 1440354304 = 19009^2 + 37952^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801696385 - 2⁶ = 1801696321 is a prime.

It is a super-2 number, since 2×1801696385² = 6492219727444136450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1801696387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180169634 + ... + 180169643.

It is an arithmetic number, because the mean of its divisors is an integer number (540508917).

Almost surely, 2^1801696385 is an apocalyptic number.

It is an amenable number.

1801696385 is a deficient number, since it is larger than the sum of its proper divisors (360339283).

1801696385 is an equidigital number, since it uses as much as digits as its factorization.

1801696385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360339282.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1801696385 is about 42446.3942520445. The cubic root of 1801696385 is about 1216.8224182500.

It can be divided in two parts, 1801696 and 385, that added together give a palindrome (1802081).

The spelling of 1801696385 in words is "one billion, eight hundred one million, six hundred ninety-six thousand, three hundred eighty-five".