51254845820 has 24 divisors (see below), whose sum is σ = 107641580928. Its totient is φ = 20500718400.

The previous prime is 51254845777. The next prime is 51254845867. The reversal of 51254845820 is 2854845215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317990 + ... + 451250.

It is an arithmetic number, because the mean of its divisors is an integer number (4485065872).

Almost surely, 2^51254845820 is an apocalyptic number.

It is an amenable number.

51254845820 is an abundant number, since it is smaller than the sum of its proper divisors (56386735108).

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

51254845820 is a wasteful number, since it uses less digits than its factorization.

51254845820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152501 (or 152499 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 44.

The spelling of 51254845820 in words is "fifty-one billion, two hundred fifty-four million, eight hundred forty-five thousand, eight hundred twenty".