68791988773 has 4 divisors (see below), whose sum is σ = 68793484320. Its totient is φ = 68790493228.

The previous prime is 68791988761. The next prime is 68791988807. The reversal of 68791988773 is 37788919786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68791988773 - 2⁹ = 68791988261 is a prime.

It is a super-3 number, since 3×68791988773³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68791988696 and 68791988705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68791986773) 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, 676513 + ... + 771526.

It is an arithmetic number, because the mean of its divisors is an integer number (17198371080).

Almost surely, 2^68791988773 is an apocalyptic number.

It is an amenable number.

68791988773 is a deficient number, since it is larger than the sum of its proper divisors (1495547).

68791988773 is a wasteful number, since it uses less digits than its factorization.

68791988773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495546.

The product of its digits is 256048128, while the sum is 73.

The spelling of 68791988773 in words is "sixty-eight billion, seven hundred ninety-one million, nine hundred eighty-eight thousand, seven hundred seventy-three".