51055657536 has 112 divisors (see below), whose sum is σ = 146280924608. Its totient is φ = 15622502400.

The previous prime is 51055657469. The next prime is 51055657561. The reversal of 51055657536 is 63575655015.

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

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, 395271 + ... + 508281.

It is an arithmetic number, because the mean of its divisors is an integer number (1306079684).

Almost surely, 2^51055657536 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 51055657536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73140462304).

51055657536 is an abundant number, since it is smaller than the sum of its proper divisors (95225267072).

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

51055657536 is a wasteful number, since it uses less digits than its factorization.

51055657536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113220 (or 113210 counting only the distinct ones).

The product of its (nonzero) digits is 2362500, while the sum is 48.

The spelling of 51055657536 in words is "fifty-one billion, fifty-five million, six hundred fifty-seven thousand, five hundred thirty-six".