318858412643 has 4 divisors (see below), whose sum is σ = 320527828608. Its totient is φ = 317188996680.

The previous prime is 318858412637. The next prime is 318858412679. The reversal of 318858412643 is 346214858813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346214858813 = 8761 ⋅39517733.

It is a cyclic number.

It is not a de Polignac number, because 318858412643 - 2⁴ = 318858412627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318858412693) 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, 834707696 + ... + 834708077.

It is an arithmetic number, because the mean of its divisors is an integer number (80131957152).

Almost surely, 2^318858412643 is an apocalyptic number.

318858412643 is a deficient number, since it is larger than the sum of its proper divisors (1669415965).

318858412643 is a wasteful number, since it uses less digits than its factorization.

318858412643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669415964.

The product of its digits is 4423680, while the sum is 53.

The spelling of 318858412643 in words is "three hundred eighteen billion, eight hundred fifty-eight million, four hundred twelve thousand, six hundred forty-three".