51427697280 has 256 divisors, whose sum is σ = 171840493440. Its totient is φ = 13067550720.

The previous prime is 51427697273. The next prime is 51427697281. The reversal of 51427697280 is 8279672415.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51427697281) 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, 3377364 + ... + 3392556.

Almost surely, 2^51427697280 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 51427697280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85920246720).

51427697280 is an abundant number, since it is smaller than the sum of its proper divisors (120412796160).

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

51427697280 is a wasteful number, since it uses less digits than its factorization.

51427697280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299 (or 15287 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 51427697280 in words is "fifty-one billion, four hundred twenty-seven million, six hundred ninety-seven thousand, two hundred eighty".