51512854848 has 504 divisors, whose sum is σ = 173593536480. Its totient is φ = 13435269120.

The previous prime is 51512854847. The next prime is 51512854919. The reversal of 51512854848 is 84845821515.

It is a super-2 number, since 2×51512854848² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51512854848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512854847) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 284601318 + ... + 284601498.

It is an arithmetic number, because the mean of its divisors is an integer number (344431620).

Almost surely, 2^51512854848 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 51512854848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86796768240).

51512854848 is an abundant number, since it is smaller than the sum of its proper divisors (122080681632).

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

51512854848 is a wasteful number, since it uses less digits than its factorization.

51512854848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 385 counting only the distinct ones).

The product of its digits is 2048000, while the sum is 51.

The spelling of 51512854848 in words is "fifty-one billion, five hundred twelve million, eight hundred fifty-four thousand, eight hundred forty-eight".