51504447407 has 4 divisors (see below), whose sum is σ = 58862225616. Its totient is φ = 44146669200.

The previous prime is 51504447361. The next prime is 51504447433. The reversal of 51504447407 is 70474440515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70474440515 = 5 ⋅14094888103.

It is a cyclic number.

It is not a de Polignac number, because 51504447407 - 2²⁰ = 51503398831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504447457) 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 3 ways as a sum of consecutive naturals, for example, 3678889094 + ... + 3678889107.

It is an arithmetic number, because the mean of its divisors is an integer number (14715556404).

Almost surely, 2^51504447407 is an apocalyptic number.

51504447407 is a deficient number, since it is larger than the sum of its proper divisors (7357778209).

51504447407 is an equidigital number, since it uses as much as digits as its factorization.

51504447407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7357778208.

The product of its (nonzero) digits is 313600, while the sum is 41.

The spelling of 51504447407 in words is "fifty-one billion, five hundred four million, four hundred forty-seven thousand, four hundred seven".