51111622805 has 8 divisors (see below), whose sum is σ = 61335338400. Its totient is φ = 40888370896.

The previous prime is 51111622789. The next prime is 51111622811. The reversal of 51111622805 is 50822611115.

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 51111622805 - 2⁴ = 51111622789 is a prime.

It is a super-2 number, since 2×51111622805² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209786 + ... + 382404.

It is an arithmetic number, because the mean of its divisors is an integer number (7666917300).

Almost surely, 2^51111622805 is an apocalyptic number.

It is an amenable number.

51111622805 is a deficient number, since it is larger than the sum of its proper divisors (10223715595).

51111622805 is a wasteful number, since it uses less digits than its factorization.

51111622805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231843.

The product of its (nonzero) digits is 4800, while the sum is 32.

The spelling of 51111622805 in words is "fifty-one billion, one hundred eleven million, six hundred twenty-two thousand, eight hundred five".