51777881450 has 12 divisors (see below), whose sum is σ = 96306859590. Its totient is φ = 20711152560.

The previous prime is 51777881429. The next prime is 51777881479. The reversal of 51777881450 is 5418877715.

It can be written as a sum of positive squares in 3 ways, for example, as 45645895201 + 6131986249 = 213649^2 + 78307^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51777881392 and 51777881401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 517778765 + ... + 517778864.

Almost surely, 2^51777881450 is an apocalyptic number.

51777881450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51777881450 is a deficient number, since it is larger than the sum of its proper divisors (44528978140).

51777881450 is a wasteful number, since it uses less digits than its factorization.

51777881450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035557641 (or 1035557636 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 53.

The spelling of 51777881450 in words is "fifty-one billion, seven hundred seventy-seven million, eight hundred eighty-one thousand, four hundred fifty".