68983464493 has 4 divisors (see below), whose sum is σ = 68984681148. Its totient is φ = 68982247840.

The previous prime is 68983464479. The next prime is 68983464497. The reversal of 68983464493 is 39446438986.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21711138409 + 47272326084 = 147347^2 + 217422^2 .

It is a cyclic number.

It is not a de Polignac number, because 68983464493 - 2¹³ = 68983456301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68983464497) 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, 518896 + ... + 638137.

It is an arithmetic number, because the mean of its divisors is an integer number (17246170287).

Almost surely, 2^68983464493 is an apocalyptic number.

It is an amenable number.

68983464493 is a deficient number, since it is larger than the sum of its proper divisors (1216655).

68983464493 is a wasteful number, since it uses less digits than its factorization.

68983464493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216654.

The product of its digits is 107495424, while the sum is 64.

The spelling of 68983464493 in words is "sixty-eight billion, nine hundred eighty-three million, four hundred sixty-four thousand, four hundred ninety-three".