68690336783 has 4 divisors (see below), whose sum is σ = 68750016768. Its totient is φ = 68630656800.

The previous prime is 68690336773. The next prime is 68690336791. The reversal of 68690336783 is 38763309686.

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 68690336783 - 2¹² = 68690332687 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 (68690336753) 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, 29838266 + ... + 29840567.

It is an arithmetic number, because the mean of its divisors is an integer number (17187504192).

Almost surely, 2^68690336783 is an apocalyptic number.

68690336783 is a deficient number, since it is larger than the sum of its proper divisors (59679985).

68690336783 is a wasteful number, since it uses less digits than its factorization.

68690336783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59679984.

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 68690336783 in words is "sixty-eight billion, six hundred ninety million, three hundred thirty-six thousand, seven hundred eighty-three".