51186001520 has 40 divisors (see below), whose sum is σ = 125271007440. Its totient is φ = 19396800000.

The previous prime is 51186001469. The next prime is 51186001597. The reversal of 51186001520 is 2510068115.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16835981 + ... + 16839020.

It is an arithmetic number, because the mean of its divisors is an integer number (3131775186).

Almost surely, 2^51186001520 is an apocalyptic number.

It is an amenable number.

51186001520 is an abundant number, since it is smaller than the sum of its proper divisors (74085005920).

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

51186001520 is a wasteful number, since it uses less digits than its factorization.

51186001520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33675033 (or 33675027 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 51186001520 its reverse (2510068115), we get a palindrome (53696069635).

The spelling of 51186001520 in words is "fifty-one billion, one hundred eighty-six million, one thousand, five hundred twenty".