51338921707 has 8 divisors (see below), whose sum is σ = 54376243056. Its totient is φ = 48303532032.

The previous prime is 51338921693. The next prime is 51338921717. The reversal of 51338921707 is 70712983315.

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 51338921707 - 2¹¹ = 51338919659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51338921717) 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, 428013 + ... + 534670.

It is an arithmetic number, because the mean of its divisors is an integer number (6797030382).

Almost surely, 2^51338921707 is an apocalyptic number.

51338921707 is a deficient number, since it is larger than the sum of its proper divisors (3037321349).

51338921707 is a wasteful number, since it uses less digits than its factorization.

51338921707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965837.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 51338921707 in words is "fifty-one billion, three hundred thirty-eight million, nine hundred twenty-one thousand, seven hundred seven".