51485056428 has 48 divisors (see below), whose sum is σ = 136181803520. Its totient is φ = 15007788864.

The previous prime is 51485056423. The next prime is 51485056429. The reversal of 51485056428 is 82465058415.

It is a super-2 number, since 2×51485056428² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51485056421) 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, 8682100 + ... + 8688027.

Almost surely, 2^51485056428 is an apocalyptic number.

It is an amenable number.

51485056428 is an abundant number, since it is smaller than the sum of its proper divisors (84696747092).

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

51485056428 is a wasteful number, since it uses less digits than its factorization.

51485056428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17370166 (or 17370164 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 48.

The spelling of 51485056428 in words is "fifty-one billion, four hundred eighty-five million, fifty-six thousand, four hundred twenty-eight".