68471861457 has 4 divisors (see below), whose sum is σ = 91295815280. Its totient is φ = 45647907636.

The previous prime is 68471861449. The next prime is 68471861461. The reversal of 68471861457 is 75416817486.

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 not a de Polignac number, because 68471861457 - 2³ = 68471861449 is a prime.

It is a super-2 number, since 2×68471861457² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68471861397 and 68471861406.

It is not an unprimeable number, because it can be changed into a prime (68471861407) 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, 11411976907 + ... + 11411976912.

It is an arithmetic number, because the mean of its divisors is an integer number (22823953820).

Almost surely, 2^68471861457 is an apocalyptic number.

It is an amenable number.

68471861457 is a deficient number, since it is larger than the sum of its proper divisors (22823953823).

68471861457 is a wasteful number, since it uses less digits than its factorization.

68471861457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22823953822.

The product of its digits is 9031680, while the sum is 57.

The spelling of 68471861457 in words is "sixty-eight billion, four hundred seventy-one million, eight hundred sixty-one thousand, four hundred fifty-seven".