51150661506 has 96 divisors (see below), whose sum is σ = 131107766400. Its totient is φ = 14101758720.

The previous prime is 51150661459. The next prime is 51150661511. The reversal of 51150661506 is 60516605115.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7783390 + ... + 7789958.

It is an arithmetic number, because the mean of its divisors is an integer number (1365705900).

Almost surely, 2^51150661506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51150661506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65553883200).

51150661506 is an abundant number, since it is smaller than the sum of its proper divisors (79957104894).

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

51150661506 is a wasteful number, since it uses less digits than its factorization.

51150661506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8744 (or 8741 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 51150661506 in words is "fifty-one billion, one hundred fifty million, six hundred sixty-one thousand, five hundred six".