51378276208 has 160 divisors (see below), whose sum is σ = 123094121472. Its totient is φ = 20297164800.

The previous prime is 51378276199. The next prime is 51378276217. The reversal of 51378276208 is 80267287315.

It is an interprime number because it is at equal distance from previous prime (51378276199) and next prime (51378276217).

It is a super-2 number, since 2×51378276208² (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 31 ways as a sum of consecutive naturals, for example, 8763198 + ... + 8769058.

Almost surely, 2^51378276208 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 51378276208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61547060736).

51378276208 is an abundant number, since it is smaller than the sum of its proper divisors (71715845264).

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

51378276208 is a wasteful number, since it uses less digits than its factorization.

51378276208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6023 (or 6017 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 51378276208 in words is "fifty-one billion, three hundred seventy-eight million, two hundred seventy-six thousand, two hundred eight".