51128853696 has 140 divisors (see below), whose sum is σ = 152105639400. Its totient is φ = 16981816320.

The previous prime is 51128853667. The next prime is 51128853701. The reversal of 51128853696 is 69635882115.

51128853696 is a `hidden beast` number, since 5 + 1 + 12 + 8 + 8 + 536 + 96 = 666.

It is a super-2 number, since 2×51128853696² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1439155 + ... + 1474253.

Almost surely, 2^51128853696 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 51128853696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76052819700).

51128853696 is an abundant number, since it is smaller than the sum of its proper divisors (100976785704).

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

51128853696 is a wasteful number, since it uses less digits than its factorization.

51128853696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35404 (or 35385 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 51128853696 in words is "fifty-one billion, one hundred twenty-eight million, eight hundred fifty-three thousand, six hundred ninety-six".