51648466530 has 64 divisors (see below), whose sum is σ = 131418661248. Its totient is φ = 12945884160.

The previous prime is 51648466511. The next prime is 51648466531. The reversal of 51648466530 is 3566484615.

It is a self number, because there is not a number n which added to its sum of digits gives 51648466530.

It is not an unprimeable number, because it can be changed into a prime (51648466531) 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, 328725 + ... + 459735.

It is an arithmetic number, because the mean of its divisors is an integer number (2053416582).

Almost surely, 2^51648466530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51648466530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65709330624).

51648466530 is an abundant number, since it is smaller than the sum of its proper divisors (79770194718).

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

51648466530 is a wasteful number, since it uses less digits than its factorization.

51648466530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131811.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 51648466530 in words is "fifty-one billion, six hundred forty-eight million, four hundred sixty-six thousand, five hundred thirty".