51546552768 has 112 divisors (see below), whose sum is σ = 152074229760. Its totient is φ = 17121307392.

The previous prime is 51546552731. The next prime is 51546552779. The reversal of 51546552768 is 86725564515.

51546552768 is a `hidden beast` number, since 5 + 1 + 54 + 6 + 5 + 527 + 68 = 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 15 ways as a sum of consecutive naturals, for example, 436321 + ... + 541727.

Almost surely, 2^51546552768 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 51546552768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76037114880).

51546552768 is an abundant number, since it is smaller than the sum of its proper divisors (100527676992).

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

51546552768 is a wasteful number, since it uses less digits than its factorization.

51546552768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105711 (or 105695 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 54.

The spelling of 51546552768 in words is "fifty-one billion, five hundred forty-six million, five hundred fifty-two thousand, seven hundred sixty-eight".