51001520166 has 24 divisors (see below), whose sum is σ = 110519201520. Its totient is φ = 16998059376.

The previous prime is 51001520093. The next prime is 51001520183. The reversal of 51001520166 is 66102510015.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73170 + ... + 327653.

It is an arithmetic number, because the mean of its divisors is an integer number (4604966730).

Almost surely, 2^51001520166 is an apocalyptic number.

51001520166 is an abundant number, since it is smaller than the sum of its proper divisors (59517681354).

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

51001520166 is a wasteful number, since it uses less digits than its factorization.

51001520166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407900 (or 407897 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 51001520166 in words is "fifty-one billion, one million, five hundred twenty thousand, one hundred sixty-six".