1801951120844 has 96 divisors (see below), whose sum is σ = 3840565370880. Its totient is φ = 722563944768.

The previous prime is 1801951120829. The next prime is 1801951120913. The reversal of 1801951120844 is 4480211591081.

It is a junction number, because it is equal to n+sod(n) for n = 1801951120795 and 1801951120804.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197946797 + ... + 197955899.

It is an arithmetic number, because the mean of its divisors is an integer number (40005889280).

Almost surely, 2^{1801951120844} is an apocalyptic number.

1801951120844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1801951120844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920282685440).

1801951120844 is an abundant number, since it is smaller than the sum of its proper divisors (2038614250036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1801951120844 is a wasteful number, since it uses less digits than its factorization.

1801951120844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13699 (or 13697 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 44.

The spelling of 1801951120844 in words is "one trillion, eight hundred one billion, nine hundred fifty-one million, one hundred twenty thousand, eight hundred forty-four".