844494971850351 has 16 divisors (see below), whose sum is σ = 1251107919868000. Its totient is φ = 562994731859904.

The previous prime is 844494971850347. The next prime is 844494971850371. The reversal of 844494971850351 is 153058179494448.

It is a happy number.

844494971850351 is a `hidden beast` number, since 8 + 4 + 4 + 4 + 9 + 4 + 97 + 185 + 0 + 351 = 666.

It is not a de Polignac number, because 844494971850351 - 2² = 844494971850347 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 844494971850351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844494971850371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45120496 + ... + 61031541.

It is an arithmetic number, because the mean of its divisors is an integer number (78194244991750).

Almost surely, 2^{844494971850351} is an apocalyptic number.

844494971850351 is a deficient number, since it is larger than the sum of its proper divisors (406612948017649).

844494971850351 is a wasteful number, since it uses less digits than its factorization.

844494971850351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106446695 (or 106446689 counting only the distinct ones).

The product of its (nonzero) digits is 696729600, while the sum is 72.

The spelling of 844494971850351 in words is "eight hundred forty-four trillion, four hundred ninety-four billion, nine hundred seventy-one million, eight hundred fifty thousand, three hundred fifty-one".