51181610495890 has 64 divisors (see below), whose sum is σ = 105583944787200. Its totient is φ = 17498649657600.

The previous prime is 51181610495879. The next prime is 51181610495891. The reversal of 51181610495890 is 9859401618115.

It is not an unprimeable number, because it can be changed into a prime (51181610495891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206171061 + ... + 206419159.

It is an arithmetic number, because the mean of its divisors is an integer number (1649749137300).

Almost surely, 2^{51181610495890} is an apocalyptic number.

51181610495890 is an abundant number, since it is smaller than the sum of its proper divisors (54402334291310).

51181610495890 is a wasteful number, since it uses less digits than its factorization.

51181610495890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256387.

The product of its (nonzero) digits is 3110400, while the sum is 58.

The spelling of 51181610495890 in words is "fifty-one trillion, one hundred eighty-one billion, six hundred ten million, four hundred ninety-five thousand, eight hundred ninety".