51798214690 has 32 divisors (see below), whose sum is σ = 95560755696. Its totient is φ = 20203376640.

The previous prime is 51798214673. The next prime is 51798214691. The reversal of 51798214690 is 9641289715.

It can be written as a sum of positive squares in 8 ways, for example, as 15675791209 + 36122423481 = 125203^2 + 190059^2 .

It is a super-3 number, since 3×51798214690³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (51798214691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 776914 + ... + 840946.

Almost surely, 2^51798214690 is an apocalyptic number.

51798214690 is a deficient number, since it is larger than the sum of its proper divisors (43762541006).

51798214690 is a wasteful number, since it uses less digits than its factorization.

51798214690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66054.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 51798214690 in words is "fifty-one billion, seven hundred ninety-eight million, two hundred fourteen thousand, six hundred ninety".