51790319616 has 208 divisors, whose sum is σ = 162093206144. Its totient is φ = 14396424192.

The previous prime is 51790319597. The next prime is 51790319617. The reversal of 51790319616 is 61691309715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (51790319617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3174456 + ... + 3190728.

Almost surely, 2^51790319616 is an apocalyptic number.

51790319616 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 51790319616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81046603072).

51790319616 is an abundant number, since it is smaller than the sum of its proper divisors (110302886528).

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

51790319616 is a wasteful number, since it uses less digits than its factorization.

51790319616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16344 (or 16322 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 48.

Subtracting 51790319616 from its reverse (61691309715), we obtain a palindrome (9900990099).

The spelling of 51790319616 in words is "fifty-one billion, seven hundred ninety million, three hundred nineteen thousand, six hundred sixteen".