51611650500 has 48 divisors (see below), whose sum is σ = 150293130624. Its totient is φ = 13763106400.

The previous prime is 51611650459. The next prime is 51611650507. The reversal of 51611650500 is 505611615.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51611650507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17202384 + ... + 17205383.

It is an arithmetic number, because the mean of its divisors is an integer number (3131106888).

Almost surely, 2^51611650500 is an apocalyptic number.

51611650500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51611650500 is an abundant number, since it is smaller than the sum of its proper divisors (98681480124).

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

51611650500 is a wasteful number, since it uses less digits than its factorization.

51611650500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34407789 (or 34407777 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51611650500 in words is "fifty-one billion, six hundred eleven million, six hundred fifty thousand, five hundred".