51413666450 has 24 divisors (see below), whose sum is σ = 98926988580. Its totient is φ = 19856312000.

The previous prime is 51413666449. The next prime is 51413666453. The reversal of 51413666450 is 5466631415.

It can be written as a sum of positive squares in 6 ways, for example, as 18028164361 + 33385502089 = 134269^2 + 182717^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51413666398 and 51413666407.

It is not an unprimeable number, because it can be changed into a prime (51413666453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17727401 + ... + 17730300.

Almost surely, 2^51413666450 is an apocalyptic number.

51413666450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51413666450 is a deficient number, since it is larger than the sum of its proper divisors (47513322130).

51413666450 is a wasteful number, since it uses less digits than its factorization.

51413666450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35457742 (or 35457737 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 51413666450 in words is "fifty-one billion, four hundred thirteen million, six hundred sixty-six thousand, four hundred fifty".