51459672493 has 2 divisors, whose sum is σ = 51459672494. Its totient is φ = 51459672492.

The previous prime is 51459672373. The next prime is 51459672689. The reversal of 51459672493 is 39427695415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31590796644 + 19868875849 = 177738^2 + 140957^2 .

It is a cyclic number.

It is not a de Polignac number, because 51459672493 - 2⁹ = 51459671981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51459672193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25729836246 + 25729836247.

It is an arithmetic number, because the mean of its divisors is an integer number (25729836247).

Almost surely, 2^51459672493 is an apocalyptic number.

It is an amenable number.

51459672493 is a deficient number, since it is larger than the sum of its proper divisors (1).

51459672493 is an equidigital number, since it uses as much as digits as its factorization.

51459672493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 55.

The spelling of 51459672493 in words is "fifty-one billion, four hundred fifty-nine million, six hundred seventy-two thousand, four hundred ninety-three".