51285563472 has 240 divisors, whose sum is σ = 158243246784. Its totient is φ = 14216294400.

The previous prime is 51285563449. The next prime is 51285563533. The reversal of 51285563472 is 27436558215.

51285563472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8528947 + ... + 8534957.

Almost surely, 2^51285563472 is an apocalyptic number.

51285563472 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51285563472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79121623392).

51285563472 is an abundant number, since it is smaller than the sum of its proper divisors (106957683312).

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

51285563472 is a wasteful number, since it uses less digits than its factorization.

51285563472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6170 (or 6153 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 48.

The spelling of 51285563472 in words is "fifty-one billion, two hundred eighty-five million, five hundred sixty-three thousand, four hundred seventy-two".