1081785801 has 8 divisors (see below), whose sum is σ = 1443876544. Its totient is φ = 720442800.

The previous prime is 1081785799. The next prime is 1081785823. The reversal of 1081785801 is 1085871801.

1081785801 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1081785801 - 2¹ = 1081785799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1081785801.

It is not an unprimeable number, because it can be changed into a prime (1081785401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183550 + ... + 189351.

It is an arithmetic number, because the mean of its divisors is an integer number (180484568).

Almost surely, 2^1081785801 is an apocalyptic number.

It is an amenable number.

1081785801 is a deficient number, since it is larger than the sum of its proper divisors (362090743).

1081785801 is an equidigital number, since it uses as much as digits as its factorization.

1081785801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373871.

The product of its (nonzero) digits is 17920, while the sum is 39.

The square root of 1081785801 is about 32890.5123249851. The cubic root of 1081785801 is about 1026.5507523015.

The spelling of 1081785801 in words is "one billion, eighty-one million, seven hundred eighty-five thousand, eight hundred one".