51440350453 has 2 divisors, whose sum is σ = 51440350454. Its totient is φ = 51440350452.

The previous prime is 51440350393. The next prime is 51440350457. The reversal of 51440350453 is 35405304415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47290156369 + 4150194084 = 217463^2 + 64422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51440350453 is a prime.

It is a super-2 number, since 2×51440350453² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51440350457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25720175226 + 25720175227.

It is an arithmetic number, because the mean of its divisors is an integer number (25720175227).

Almost surely, 2^51440350453 is an apocalyptic number.

It is an amenable number.

51440350453 is a deficient number, since it is larger than the sum of its proper divisors (1).

51440350453 is an equidigital number, since it uses as much as digits as its factorization.

51440350453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 51440350453 its reverse (35405304415), we get a palindrome (86845654868).

The spelling of 51440350453 in words is "fifty-one billion, four hundred forty million, three hundred fifty thousand, four hundred fifty-three".