51948521280 has 336 divisors, whose sum is σ = 192886462080. Its totient is φ = 12793245696.

The previous prime is 51948521237. The next prime is 51948521437. The reversal of 51948521280 is 8212584915.

51948521280 is a `hidden beast` number, since 5 + 1 + 9 + 48 + 521 + 2 + 80 = 666.

It is a super-2 number, since 2×51948521280² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1907439 + ... + 1934481.

Almost surely, 2^51948521280 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 51948521280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96443231040).

51948521280 is an abundant number, since it is smaller than the sum of its proper divisors (140937940800).

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

51948521280 is a wasteful number, since it uses less digits than its factorization.

51948521280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27118 (or 27105 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 51948521280 in words is "fifty-one billion, nine hundred forty-eight million, five hundred twenty-one thousand, two hundred eighty".