1800163721050 has 24 divisors (see below), whose sum is σ = 3351163984992. Its totient is φ = 719450550000.

The previous prime is 1800163721039. The next prime is 1800163721063. The reversal of 1800163721050 is 501273610081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1800163720997 and 1800163721015.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15314326 + ... + 15431425.

It is an arithmetic number, because the mean of its divisors is an integer number (139631832708).

Almost surely, 2^{1800163721050} is an apocalyptic number.

1800163721050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1800163721050 is a deficient number, since it is larger than the sum of its proper divisors (1551000263942).

1800163721050 is a wasteful number, since it uses less digits than its factorization.

1800163721050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30746934 (or 30746929 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 1800163721050 in words is "one trillion, eight hundred billion, one hundred sixty-three million, seven hundred twenty-one thousand, fifty".