51651161105000 has 80 divisors (see below), whose sum is σ = 121250958101460. Its totient is φ = 20620808000000.

The previous prime is 51651161104937. The next prime is 51651161105009. The reversal of 51651161105000 is 50116115615.

It can be written as a sum of positive squares in 10 ways, for example, as 2498694687076 + 49152466417924 = 1580726^2 + 7010882^2 .

It is not an unprimeable number, because it can be changed into a prime (51651161105009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7308851 + ... + 12518850.

Almost surely, 2^{51651161105000} is an apocalyptic number.

51651161105000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51651161105000 is an abundant number, since it is smaller than the sum of its proper divisors (69599796996460).

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

51651161105000 is a wasteful number, since it uses less digits than its factorization.

51651161105000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19828248 (or 19828229 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 51651161105000 in words is "fifty-one trillion, six hundred fifty-one billion, one hundred sixty-one million, one hundred five thousand".