51421900671 has 24 divisors (see below), whose sum is σ = 75904570560. Its totient is φ = 33530582016.

The previous prime is 51421900661. The next prime is 51421900693. The reversal of 51421900671 is 17600912415.

It is not a de Polignac number, because 51421900671 - 2¹⁰ = 51421899647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421900601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 642831 + ... + 718383.

It is an arithmetic number, because the mean of its divisors is an integer number (3162690440).

Almost surely, 2^51421900671 is an apocalyptic number.

51421900671 is a deficient number, since it is larger than the sum of its proper divisors (24482669889).

51421900671 is a wasteful number, since it uses less digits than its factorization.

51421900671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77215 (or 77212 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 51421900671 in words is "fifty-one billion, four hundred twenty-one million, nine hundred thousand, six hundred seventy-one".