51485328400 has 60 divisors (see below), whose sum is σ = 134938376784. Its totient is φ = 18721936000.

The previous prime is 51485328373. The next prime is 51485328403. The reversal of 51485328400 is 482358415.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (51485328403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5846206 + ... + 5855005.

Almost surely, 2^51485328400 is an apocalyptic number.

51485328400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51485328400 is an abundant number, since it is smaller than the sum of its proper divisors (83453048384).

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

51485328400 is a wasteful number, since it uses less digits than its factorization.

51485328400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11701240 (or 11701229 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 51485328400 in words is "fifty-one billion, four hundred eighty-five million, three hundred twenty-eight thousand, four hundred".