51342989468821 has 8 divisors (see below), whose sum is σ = 52007617370880. Its totient is φ = 50678729482992.

The previous prime is 51342989468809. The next prime is 51342989468959. The reversal of 51342989468821 is 12886498924315.

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

It is not a de Polignac number, because 51342989468821 - 2²³ = 51342981080213 is a prime.

It is a super-2 number, since 2×51342989468821² (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 (51342989468521) 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, 91698145 + ... + 92256358.

It is an arithmetic number, because the mean of its divisors is an integer number (6500952171360).

Almost surely, 2^{51342989468821} is an apocalyptic number.

It is an amenable number.

51342989468821 is a deficient number, since it is larger than the sum of its proper divisors (664627902059).

51342989468821 is a wasteful number, since it uses less digits than its factorization.

51342989468821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183958115.

The product of its digits is 238878720, while the sum is 70.

The spelling of 51342989468821 in words is "fifty-one trillion, three hundred forty-two billion, nine hundred eighty-nine million, four hundred sixty-eight thousand, eight hundred twenty-one".