51899218776 has 112 divisors (see below), whose sum is σ = 146131389360. Its totient is φ = 17272284480.

The previous prime is 51899218769. The next prime is 51899218783. The reversal of 51899218776 is 67781299815.

51899218776 is a `hidden beast` number, since 518 + 99 + 21 + 8 + 7 + 7 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (51899218769) and next prime (51899218783).

It is a super-2 number, since 2×51899218776² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3848221 + ... + 3861683.

Almost surely, 2^51899218776 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 51899218776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73065694680).

51899218776 is an abundant number, since it is smaller than the sum of its proper divisors (94232170584).

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

51899218776 is a wasteful number, since it uses less digits than its factorization.

51899218776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14148 (or 14129 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 63.

The spelling of 51899218776 in words is "fifty-one billion, eight hundred ninety-nine million, two hundred eighteen thousand, seven hundred seventy-six".