51775644480 has 896 divisors, whose sum is σ = 207743877120. Its totient is φ = 10659962880.

The previous prime is 51775644451. The next prime is 51775644493. The reversal of 51775644480 is 8444657715.

It is a super-2 number, since 2×51775644480² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 407682177 + ... + 407682303.

Almost surely, 2^51775644480 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 51775644480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103871938560).

51775644480 is an abundant number, since it is smaller than the sum of its proper divisors (155968232640).

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

51775644480 is a wasteful number, since it uses less digits than its factorization.

51775644480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 51.

The spelling of 51775644480 in words is "fifty-one billion, seven hundred seventy-five million, six hundred forty-four thousand, four hundred eighty".