51111016651005 has 32 divisors (see below), whose sum is σ = 82132849079424. Its totient is φ = 27140813500416.

The previous prime is 51111016650989. The next prime is 51111016651169. The reversal of 51111016651005 is 50015661011115.

It is not a de Polignac number, because 51111016651005 - 2⁴ = 51111016650989 is a prime.

It is a super-2 number, since 2×51111016651005² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69067117 + ... + 69803213.

It is an arithmetic number, because the mean of its divisors is an integer number (2566651533732).

Almost surely, 2^{51111016651005} is an apocalyptic number.

It is an amenable number.

51111016651005 is a deficient number, since it is larger than the sum of its proper divisors (31021832428419).

51111016651005 is a wasteful number, since it uses less digits than its factorization.

51111016651005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756205.

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 51111016651005 in words is "fifty-one trillion, one hundred eleven billion, sixteen million, six hundred fifty-one thousand, five".