394181064051 has 16 divisors (see below), whose sum is σ = 538697827584. Its totient is φ = 256285219424.

The previous prime is 394181064049. The next prime is 394181064071. The reversal of 394181064051 is 150460181493.

It is a cyclic number.

It is not a de Polignac number, because 394181064051 - 2¹ = 394181064049 is a prime.

It is a super-2 number, since 2×394181064051² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 394181063994 and 394181064012.

It is not an unprimeable number, because it can be changed into a prime (394181064071) 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, 7395981 + ... + 7449086.

It is an arithmetic number, because the mean of its divisors is an integer number (33668614224).

Almost surely, 2^394181064051 is an apocalyptic number.

394181064051 is a deficient number, since it is larger than the sum of its proper divisors (144516763533).

394181064051 is a wasteful number, since it uses less digits than its factorization.

394181064051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14845290.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 394181064051 in words is "three hundred ninety-four billion, one hundred eighty-one million, sixty-four thousand, fifty-one".