51419566968 has 128 divisors (see below), whose sum is σ = 160341534720. Its totient is φ = 13349669760.

The previous prime is 51419566967. The next prime is 51419566973. The reversal of 51419566968 is 86966591415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51419566967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5248971 + ... + 5258757.

It is an arithmetic number, because the mean of its divisors is an integer number (1252668240).

Almost surely, 2^51419566968 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 51419566968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80170767360).

51419566968 is an abundant number, since it is smaller than the sum of its proper divisors (108921967752).

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

51419566968 is a wasteful number, since it uses less digits than its factorization.

51419566968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12657 (or 12653 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 60.

The spelling of 51419566968 in words is "fifty-one billion, four hundred nineteen million, five hundred sixty-six thousand, nine hundred sixty-eight".