394605911481 has 16 divisors (see below), whose sum is σ = 543183556608. Its totient is φ = 254551626000.

The previous prime is 394605911459. The next prime is 394605911489. The reversal of 394605911481 is 184119506493.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-394605911481 is a prime.

It is a super-2 number, since 2×394605911481² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394605911489) 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, 461956 + ... + 1001306.

It is an arithmetic number, because the mean of its divisors is an integer number (33948972288).

Almost surely, 2^394605911481 is an apocalyptic number.

394605911481 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

394605911481 is a deficient number, since it is larger than the sum of its proper divisors (148577645127).

394605911481 is a wasteful number, since it uses less digits than its factorization.

394605911481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547252.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 394605911481 in words is "three hundred ninety-four billion, six hundred five million, nine hundred eleven thousand, four hundred eighty-one".