794849161581 has 24 divisors (see below), whose sum is σ = 1211333789120. Its totient is φ = 500850573696.

The previous prime is 794849161573. The next prime is 794849161741. The reversal of 794849161581 is 185161948497.

794849161581 is a `hidden beast` number, since 7 + 9 + 4 + 8 + 4 + 9 + 1 + 615 + 8 + 1 = 666.

794849161581 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 794849161581 - 2³ = 794849161573 is a prime.

It is a super-2 number, since 2×794849161581² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (794849161181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5293441 + ... + 5441526.

Almost surely, 2^794849161581 is an apocalyptic number.

It is an amenable number.

794849161581 is a deficient number, since it is larger than the sum of its proper divisors (416484627539).

794849161581 is a wasteful number, since it uses less digits than its factorization.

794849161581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10735425 (or 10735422 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The spelling of 794849161581 in words is "seven hundred ninety-four billion, eight hundred forty-nine million, one hundred sixty-one thousand, five hundred eighty-one".