51565350408 has 64 divisors (see below), whose sum is σ = 151450689600. Its totient is φ = 14423873280.

The previous prime is 51565350407. The next prime is 51565350479. The reversal of 51565350408 is 80405356515.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51565350408.

It is not an unprimeable number, because it can be changed into a prime (51565350407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7509003 + ... + 7515866.

It is an arithmetic number, because the mean of its divisors is an integer number (2366417025).

Almost surely, 2^51565350408 is an apocalyptic number.

It is an amenable number.

51565350408 is an abundant number, since it is smaller than the sum of its proper divisors (99885339192).

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

51565350408 is a wasteful number, since it uses less digits than its factorization.

51565350408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15024902 (or 15024898 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 51565350408 in words is "fifty-one billion, five hundred sixty-five million, three hundred fifty thousand, four hundred eight".