51549372851 has 2 divisors, whose sum is σ = 51549372852. Its totient is φ = 51549372850.

The previous prime is 51549372827. The next prime is 51549372869. The reversal of 51549372851 is 15827394515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51549372851 - 2³⁰ = 50475631027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51549372851.

It is not a weakly prime, because it can be changed into another prime (51549332851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25774686425 + 25774686426.

It is an arithmetic number, because the mean of its divisors is an integer number (25774686426).

Almost surely, 2^51549372851 is an apocalyptic number.

51549372851 is a deficient number, since it is larger than the sum of its proper divisors (1).

51549372851 is an equidigital number, since it uses as much as digits as its factorization.

51549372851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 50.

The spelling of 51549372851 in words is "fifty-one billion, five hundred forty-nine million, three hundred seventy-two thousand, eight hundred fifty-one".