51235328256 has 432 divisors, whose sum is σ = 168554453760. Its totient is φ = 13737185280.

The previous prime is 51235328231. The next prime is 51235328279. The reversal of 51235328256 is 65282353215.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 93665775 + ... + 93666321.

Almost surely, 2^51235328256 is an apocalyptic number.

51235328256 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 51235328256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84277226880).

51235328256 is an abundant number, since it is smaller than the sum of its proper divisors (117319125504).

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

51235328256 is a wasteful number, since it uses less digits than its factorization.

51235328256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 709 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The spelling of 51235328256 in words is "fifty-one billion, two hundred thirty-five million, three hundred twenty-eight thousand, two hundred fifty-six".