51165650010009 has 4 divisors (see below), whose sum is σ = 68220866680016. Its totient is φ = 34110433340004.

The previous prime is 51165650010001. The next prime is 51165650010053. The reversal of 51165650010009 is 90001005656115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51165650010009 - 2³ = 51165650010001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51165650010001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8527608334999 + ... + 8527608335004.

It is an arithmetic number, because the mean of its divisors is an integer number (17055216670004).

Almost surely, 2^{51165650010009} is an apocalyptic number.

It is an amenable number.

51165650010009 is a deficient number, since it is larger than the sum of its proper divisors (17055216670007).

51165650010009 is a wasteful number, since it uses less digits than its factorization.

51165650010009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17055216670006.

The product of its (nonzero) digits is 40500, while the sum is 39.

The spelling of 51165650010009 in words is "fifty-one trillion, one hundred sixty-five billion, six hundred fifty million, ten thousand, nine".