51581962679 has 8 divisors (see below), whose sum is σ = 58473480240. Its totient is φ = 45108112896.

The previous prime is 51581962673. The next prime is 51581962709. The reversal of 51581962679 is 97626918515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51581962679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51581962673) 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, 104416682 + ... + 104417175.

It is an arithmetic number, because the mean of its divisors is an integer number (7309185030).

Almost surely, 2^51581962679 is an apocalyptic number.

51581962679 is a deficient number, since it is larger than the sum of its proper divisors (6891517561).

51581962679 is a wasteful number, since it uses less digits than its factorization.

51581962679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208833889.

The product of its digits is 8164800, while the sum is 59.

The spelling of 51581962679 in words is "fifty-one billion, five hundred eighty-one million, nine hundred sixty-two thousand, six hundred seventy-nine".