994486741681 has 4 divisors (see below), whose sum is σ = 994546808164. Its totient is φ = 994426675200.

The previous prime is 994486741673. The next prime is 994486741693. The reversal of 994486741681 is 186147684499.

994486741681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45703598656 + 948783143025 = 213784^2 + 974055^2 .

It is a cyclic number.

It is not a de Polignac number, because 994486741681 - 2³ = 994486741673 is a prime.

It is a super-2 number, since 2×994486741681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994486741631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30008400 + ... + 30041521.

It is an arithmetic number, because the mean of its divisors is an integer number (248636702041).

Almost surely, 2^994486741681 is an apocalyptic number.

It is an amenable number.

994486741681 is a deficient number, since it is larger than the sum of its proper divisors (60066483).

994486741681 is a wasteful number, since it uses less digits than its factorization.

994486741681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60066482.

The product of its digits is 83607552, while the sum is 67.

The spelling of 994486741681 in words is "nine hundred ninety-four billion, four hundred eighty-six million, seven hundred forty-one thousand, six hundred eighty-one".