68792009798821 has 8 divisors (see below), whose sum is σ = 68914915000344. Its totient is φ = 68669117337600.

The previous prime is 68792009798807. The next prime is 68792009798891. The reversal of 68792009798821 is 12889790029786.

It can be written as a sum of positive squares in 4 ways, for example, as 64048809302500 + 4743200496321 = 8003050^2 + 2177889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68792009798821 - 2¹⁷ = 68792009667749 is a prime.

It is a super-2 number, since 2×68792009798821² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68792009798891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7656621 + ... + 14007421.

It is an arithmetic number, because the mean of its divisors is an integer number (8614364375043).

Almost surely, 2^{68792009798821} is an apocalyptic number.

It is an amenable number.

68792009798821 is a deficient number, since it is larger than the sum of its proper divisors (122905201523).

68792009798821 is a wasteful number, since it uses less digits than its factorization.

68792009798821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370151.

The product of its (nonzero) digits is 438939648, while the sum is 76.

The spelling of 68792009798821 in words is "sixty-eight trillion, seven hundred ninety-two billion, nine million, seven hundred ninety-eight thousand, eight hundred twenty-one".