51309076997 has 8 divisors (see below), whose sum is σ = 51509336736. Its totient is φ = 51108951312.

The previous prime is 51309076937. The next prime is 51309077069. The reversal of 51309076997 is 79967090315.

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 51309076997 - 2¹² = 51309072901 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 (51309076937) 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, 770918 + ... + 834824.

It is an arithmetic number, because the mean of its divisors is an integer number (6438667092).

Almost surely, 2^51309076997 is an apocalyptic number.

It is an amenable number.

51309076997 is a deficient number, since it is larger than the sum of its proper divisors (200259739).

51309076997 is a wasteful number, since it uses less digits than its factorization.

51309076997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67027.

The product of its (nonzero) digits is 3214890, while the sum is 56.

The spelling of 51309076997 in words is "fifty-one billion, three hundred nine million, seventy-six thousand, nine hundred ninety-seven".