51540206280 has 128 divisors (see below), whose sum is σ = 163916524800. Its totient is φ = 12919734272.

The previous prime is 51540206233. The next prime is 51540206299. The reversal of 51540206280 is 8260204515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1696504 + ... + 1726616.

It is an arithmetic number, because the mean of its divisors is an integer number (1280597850).

Almost surely, 2^51540206280 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 51540206280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81958262400).

51540206280 is an abundant number, since it is smaller than the sum of its proper divisors (112376318520).

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

51540206280 is a wasteful number, since it uses less digits than its factorization.

51540206280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30983 (or 30979 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The spelling of 51540206280 in words is "fifty-one billion, five hundred forty million, two hundred six thousand, two hundred eighty".