394564361963 has 4 divisors (see below), whose sum is σ = 394594705080. Its totient is φ = 394534018848.

The previous prime is 394564361953. The next prime is 394564361977. The reversal of 394564361963 is 369163465493.

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

It is a cyclic number.

It is not a de Polignac number, because 394564361963 - 2¹⁸ = 394564099819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394564361953) 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, 15152045 + ... + 15178062.

It is an arithmetic number, because the mean of its divisors is an integer number (98648676270).

Almost surely, 2^394564361963 is an apocalyptic number.

394564361963 is a deficient number, since it is larger than the sum of its proper divisors (30343117).

394564361963 is a wasteful number, since it uses less digits than its factorization.

394564361963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30343116.

The product of its digits is 37791360, while the sum is 59.

The spelling of 394564361963 in words is "three hundred ninety-four billion, five hundred sixty-four million, three hundred sixty-one thousand, nine hundred sixty-three".