51395583456 has 480 divisors, whose sum is σ = 180112584960. Its totient is φ = 14071449600.

The previous prime is 51395583439. The next prime is 51395583467. The reversal of 51395583456 is 65438559315.

51395583456 is a `hidden beast` number, since 5 + 1 + 3 + 9 + 5 + 583 + 4 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 43889751 + ... + 43890921.

It is an arithmetic number, because the mean of its divisors is an integer number (375234552).

Almost surely, 2^51395583456 is an apocalyptic number.

51395583456 is a gapful number since it is divisible by the number (56) 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 51395583456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90056292480).

51395583456 is an abundant number, since it is smaller than the sum of its proper divisors (128717001504).

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

51395583456 is a wasteful number, since it uses less digits than its factorization.

51395583456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1283 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 54.

The spelling of 51395583456 in words is "fifty-one billion, three hundred ninety-five million, five hundred eighty-three thousand, four hundred fifty-six".