51355380473 has 2 divisors, whose sum is σ = 51355380474. Its totient is φ = 51355380472.

The previous prime is 51355380469. The next prime is 51355380521. The reversal of 51355380473 is 37408355315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32242870969 + 19112509504 = 179563^2 + 138248^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355380473 - 2² = 51355380469 is a prime.

It is not a weakly prime, because it can be changed into another prime (51355389473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677690236 + 25677690237.

It is an arithmetic number, because the mean of its divisors is an integer number (25677690237).

Almost surely, 2^51355380473 is an apocalyptic number.

It is an amenable number.

51355380473 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355380473 is an equidigital number, since it uses as much as digits as its factorization.

51355380473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 51355380473 in words is "fifty-one billion, three hundred fifty-five million, three hundred eighty thousand, four hundred seventy-three".