51545654516 has 12 divisors (see below), whose sum is σ = 90213345600. Its totient is φ = 25770412920.

The previous prime is 51545654513. The next prime is 51545654521. The reversal of 51545654516 is 61545654515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545654513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555116 + ... + 641283.

It is an arithmetic number, because the mean of its divisors is an integer number (7517778800).

Almost surely, 2^51545654516 is an apocalyptic number.

It is an amenable number.

51545654516 is a deficient number, since it is larger than the sum of its proper divisors (38667691084).

51545654516 is a wasteful number, since it uses less digits than its factorization.

51545654516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207174 (or 1207172 counting only the distinct ones).

The product of its digits is 1800000, while the sum is 47.

Subtracting 51545654516 from its reverse (61545654515), we obtain a palindrome (9999999999).

The spelling of 51545654516 in words is "fifty-one billion, five hundred forty-five million, six hundred fifty-four thousand, five hundred sixteen".