51565155510 has 96 divisors (see below), whose sum is σ = 136121078016. Its totient is φ = 12492251200.

The previous prime is 51565155457. The next prime is 51565155511. The reversal of 51565155510 is 1555156515.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51565155511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6700765 + ... + 6708455.

It is an arithmetic number, because the mean of its divisors is an integer number (1417927896).

Almost surely, 2^51565155510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51565155510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68060539008).

51565155510 is an abundant number, since it is smaller than the sum of its proper divisors (84555922506).

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

51565155510 is a wasteful number, since it uses less digits than its factorization.

51565155510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570 (or 9559 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 51565155510 in words is "fifty-one billion, five hundred sixty-five million, one hundred fifty-five thousand, five hundred ten".