51000505556505 has 32 divisors (see below), whose sum is σ = 81622133658624. Its totient is φ = 27193162401216.

The previous prime is 51000505556437. The next prime is 51000505556519. The reversal of 51000505556505 is 50565550500015.

It is not a de Polignac number, because 51000505556505 - 2¹⁴ = 51000505540121 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1090966542 + ... + 1091013288.

It is an arithmetic number, because the mean of its divisors is an integer number (2550691676832).

Almost surely, 2^{51000505556505} is an apocalyptic number.

It is an amenable number.

51000505556505 is a deficient number, since it is larger than the sum of its proper divisors (30621628102119).

51000505556505 is a wasteful number, since it uses less digits than its factorization.

51000505556505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64205.

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 51000505556505 in words is "fifty-one trillion, five hundred five million, five hundred fifty-six thousand, five hundred five".