51453198056 has 64 divisors (see below), whose sum is σ = 104730796800. Its totient is φ = 23557248000.

The previous prime is 51453198047. The next prime is 51453198059. The reversal of 51453198056 is 65089135415.

It is a self number, because there is not a number n which added to its sum of digits gives 51453198056.

It is not an unprimeable number, because it can be changed into a prime (51453198059) 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, 13833365 + ... + 13837083.

It is an arithmetic number, because the mean of its divisors is an integer number (1636418700).

Almost surely, 2^51453198056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51453198056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52365398400).

51453198056 is an abundant number, since it is smaller than the sum of its proper divisors (53277598744).

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

51453198056 is a wasteful number, since it uses less digits than its factorization.

51453198056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770 (or 4766 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 51453198056 in words is "fifty-one billion, four hundred fifty-three million, one hundred ninety-eight thousand, fifty-six".