51111050605 has 8 divisors (see below), whose sum is σ = 64561327200. Its totient is φ = 38736796176.

The previous prime is 51111050597. The next prime is 51111050621. The reversal of 51111050605 is 50605011115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51111050605 - 2³ = 51111050597 is a prime.

It is a super-2 number, since 2×51111050605² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51111050605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269005435 + ... + 269005624.

It is an arithmetic number, because the mean of its divisors is an integer number (8070165900).

Almost surely, 2^51111050605 is an apocalyptic number.

It is an amenable number.

51111050605 is a deficient number, since it is larger than the sum of its proper divisors (13450276595).

51111050605 is a wasteful number, since it uses less digits than its factorization.

51111050605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538011083.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 51111050605 in words is "fifty-one billion, one hundred eleven million, fifty thousand, six hundred five".