51344759197 has 4 divisors (see below), whose sum is σ = 51391310400. Its totient is φ = 51298207996.

The previous prime is 51344759189. The next prime is 51344759209. The reversal of 51344759197 is 79195744315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51344759197 - 2³ = 51344759189 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 (51344759107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23273947 + ... + 23276152.

It is an arithmetic number, because the mean of its divisors is an integer number (12847827600).

Almost surely, 2^51344759197 is an apocalyptic number.

It is an amenable number.

51344759197 is a deficient number, since it is larger than the sum of its proper divisors (46551203).

51344759197 is a wasteful number, since it uses less digits than its factorization.

51344759197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46551202.

The product of its digits is 4762800, while the sum is 55.

The spelling of 51344759197 in words is "fifty-one billion, three hundred forty-four million, seven hundred fifty-nine thousand, one hundred ninety-seven".