51106890309 has 4 divisors (see below), whose sum is σ = 68142520416. Its totient is φ = 34071260204.

The previous prime is 51106890299. The next prime is 51106890311. The reversal of 51106890309 is 90309860115.

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 a cyclic number.

It is not a de Polignac number, because 51106890309 - 2¹³ = 51106882117 is a prime.

It is a super-2 number, since 2×51106890309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51106890349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8517815049 + ... + 8517815054.

It is an arithmetic number, because the mean of its divisors is an integer number (17035630104).

Almost surely, 2^51106890309 is an apocalyptic number.

It is an amenable number.

51106890309 is a deficient number, since it is larger than the sum of its proper divisors (17035630107).

51106890309 is a wasteful number, since it uses less digits than its factorization.

51106890309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17035630106.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 51106890309 in words is "fifty-one billion, one hundred six million, eight hundred ninety thousand, three hundred nine".