51487169280 has 288 divisors, whose sum is σ = 168477926400. Its totient is φ = 13396770816.

The previous prime is 51487169257. The next prime is 51487169287. The reversal of 51487169280 is 8296178415.

It is not an unprimeable number, because it can be changed into a prime (51487169287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26998087 + ... + 26999993.

It is an arithmetic number, because the mean of its divisors is an integer number (584992800).

Almost surely, 2^51487169280 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 51487169280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84238963200).

51487169280 is an abundant number, since it is smaller than the sum of its proper divisors (116990757120).

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

51487169280 is a wasteful number, since it uses less digits than its factorization.

51487169280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2085 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 51487169280 in words is "fifty-one billion, four hundred eighty-seven million, one hundred sixty-nine thousand, two hundred eighty".