51646932481 has 8 divisors (see below), whose sum is σ = 52327654400. Its totient is φ = 50966884800.

The previous prime is 51646932473. The next prime is 51646932499. The reversal of 51646932481 is 18423964615.

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 51646932481 - 2³ = 51646932473 is a prime.

It is a super-2 number, since 2×51646932481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51646932431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13416 + ... + 321673.

It is an arithmetic number, because the mean of its divisors is an integer number (6540956800).

Almost surely, 2^51646932481 is an apocalyptic number.

It is an amenable number.

51646932481 is a deficient number, since it is larger than the sum of its proper divisors (680721919).

51646932481 is a wasteful number, since it uses less digits than its factorization.

51646932481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337119.

The product of its digits is 1244160, while the sum is 49.

The spelling of 51646932481 in words is "fifty-one billion, six hundred forty-six million, nine hundred thirty-two thousand, four hundred eighty-one".