844646381901 has 12 divisors (see below), whose sum is σ = 1394336884512. Its totient is φ = 482655075336.

The previous prime is 844646381897. The next prime is 844646381921. The reversal of 844646381901 is 109183646448.

844646381901 is a `hidden beast` number, since 8 + 446 + 4 + 6 + 3 + 8 + 190 + 1 = 666.

844646381901 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 844646381901 - 2² = 844646381897 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844646381921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6703542651 + ... + 6703542776.

It is an arithmetic number, because the mean of its divisors is an integer number (116194740376).

Almost surely, 2^844646381901 is an apocalyptic number.

It is an amenable number.

844646381901 is a deficient number, since it is larger than the sum of its proper divisors (549690502611).

844646381901 is a wasteful number, since it uses less digits than its factorization.

844646381901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13407085440 (or 13407085437 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 844646381901 in words is "eight hundred forty-four billion, six hundred forty-six million, three hundred eighty-one thousand, nine hundred one".