51052557894 has 64 divisors (see below), whose sum is σ = 114200694720. Its totient is φ = 15112120320.

The previous prime is 51052557893. The next prime is 51052557929. The reversal of 51052557894 is 49875525015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51052557893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157474 + ... + 356234.

It is an arithmetic number, because the mean of its divisors is an integer number (1784385855).

Almost surely, 2^51052557894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51052557894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57100347360).

51052557894 is an abundant number, since it is smaller than the sum of its proper divisors (63148136826).

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

51052557894 is a wasteful number, since it uses less digits than its factorization.

51052557894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198905.

The product of its (nonzero) digits is 2520000, while the sum is 51.

The spelling of 51052557894 in words is "fifty-one billion, fifty-two million, five hundred fifty-seven thousand, eight hundred ninety-four".