51921706743 has 12 divisors (see below), whose sum is σ = 75042185400. Its totient is φ = 34594087536.

The previous prime is 51921706721. The next prime is 51921706747. The reversal of 51921706743 is 34760712915.

51921706743 is a `hidden beast` number, since 519 + 2 + 1 + 70 + 67 + 4 + 3 = 666.

It is not a de Polignac number, because 51921706743 - 2⁹ = 51921706231 is a prime.

It is a super-2 number, since 2×51921706743² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51921706747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1682496 + ... + 1713077.

It is an arithmetic number, because the mean of its divisors is an integer number (6253515450).

Almost surely, 2^51921706743 is an apocalyptic number.

51921706743 is a deficient number, since it is larger than the sum of its proper divisors (23120478657).

51921706743 is a wasteful number, since it uses less digits than its factorization.

51921706743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397278 (or 3397275 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 51921706743 in words is "fifty-one billion, nine hundred twenty-one million, seven hundred six thousand, seven hundred forty-three".