51382163504025 has 36 divisors (see below), whose sum is σ = 92037476374428. Its totient is φ = 27401940910080.

The previous prime is 51382163504017. The next prime is 51382163504029. The reversal of 51382163504025 is 52040536128315.

It is a happy number.

51382163504025 is a `hidden beast` number, since 5 + 1 + 3 + 8 + 2 + 1 + 635 + 0 + 4 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 12241524466521 + 39140639037504 = 3498789^2 + 6256248^2 .

It is not a de Polignac number, because 51382163504025 - 2³ = 51382163504017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (51382163504029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4541052 + ... + 11107901.

Almost surely, 2^{51382163504025} is an apocalyptic number.

It is an amenable number.

51382163504025 is a deficient number, since it is larger than the sum of its proper divisors (40655312870403).

51382163504025 is a wasteful number, since it uses less digits than its factorization.

51382163504025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15663562 (or 15663554 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 51382163504025 in words is "fifty-one trillion, three hundred eighty-two billion, one hundred sixty-three million, five hundred four thousand, twenty-five".