51803648407 has 16 divisors (see below), whose sum is σ = 59846097472. Its totient is φ = 43922165760.

The previous prime is 51803648339. The next prime is 51803648411. The reversal of 51803648407 is 70484630815.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51803648407 - 2²³ = 51795259799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51803649407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1334107 + ... + 1372387.

It is an arithmetic number, because the mean of its divisors is an integer number (3740381092).

Almost surely, 2^51803648407 is an apocalyptic number.

51803648407 is a deficient number, since it is larger than the sum of its proper divisors (8042449065).

51803648407 is a wasteful number, since it uses less digits than its factorization.

51803648407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40378.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 51803648407 in words is "fifty-one billion, eight hundred three million, six hundred forty-eight thousand, four hundred seven".