51538749548496 has 640 divisors, whose sum is σ = 161292826312704. Its totient is φ = 13872953825280.

The previous prime is 51538749548491. The next prime is 51538749548609. The reversal of 51538749548496 is 69484594783515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538749548491) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 58767102810 + ... + 58767103686.

Almost surely, 2^{51538749548496} is an apocalyptic number.

51538749548496 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51538749548496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80646413156352).

51538749548496 is an abundant number, since it is smaller than the sum of its proper divisors (109754076764208).

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

51538749548496 is a wasteful number, since it uses less digits than its factorization.

51538749548496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887 (or 1881 counting only the distinct ones).

The product of its digits is 5225472000, while the sum is 78.

The spelling of 51538749548496 in words is "fifty-one trillion, five hundred thirty-eight billion, seven hundred forty-nine million, five hundred forty-eight thousand, four hundred ninety-six".