51954816620 has 36 divisors (see below), whose sum is σ = 126918197280. Its totient is φ = 17813079648.

The previous prime is 51954816593. The next prime is 51954816623. The reversal of 51954816620 is 2661845915.

It is not an unprimeable number, because it can be changed into a prime (51954816623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26506580 + ... + 26508539.

It is an arithmetic number, because the mean of its divisors is an integer number (3525505480).

Almost surely, 2^51954816620 is an apocalyptic number.

It is an amenable number.

51954816620 is an abundant number, since it is smaller than the sum of its proper divisors (74963380660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51954816620 is a wasteful number, since it uses less digits than its factorization.

51954816620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53015142 (or 53015133 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 51954816620 in words is "fifty-one billion, nine hundred fifty-four million, eight hundred sixteen thousand, six hundred twenty".