320618608634 has 4 divisors (see below), whose sum is σ = 480927912954. Its totient is φ = 160309304316.

The previous prime is 320618608603. The next prime is 320618608643. The reversal of 320618608634 is 436806816023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436806816023 = 34183 ⋅12778481.

It can be written as a sum of positive squares in only one way, i.e., 246278950225 + 74339658409 = 496265^2 + 272653^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80154652157 + ... + 80154652160.

Almost surely, 2^320618608634 is an apocalyptic number.

320618608634 is a deficient number, since it is larger than the sum of its proper divisors (160309304320).

320618608634 is a wasteful number, since it uses less digits than its factorization.

320618608634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160309304319.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 320618608634 in words is "three hundred twenty billion, six hundred eighteen million, six hundred eight thousand, six hundred thirty-four".