51705208017 has 12 divisors (see below), whose sum is σ = 74696141520. Its totient is φ = 34465135128.

The previous prime is 51705208007. The next prime is 51705208067. The reversal of 51705208017 is 71080250715.

51705208017 is a `hidden beast` number, since 51 + 7 + 0 + 520 + 80 + 1 + 7 = 666.

It is not a de Polignac number, because 51705208017 - 2¹⁴ = 51705191633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51705208007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350967 + ... + 476012.

It is an arithmetic number, because the mean of its divisors is an integer number (6224678460).

Almost surely, 2^51705208017 is an apocalyptic number.

It is an amenable number.

51705208017 is a deficient number, since it is larger than the sum of its proper divisors (22990933503).

51705208017 is a wasteful number, since it uses less digits than its factorization.

51705208017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833932 (or 833929 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The spelling of 51705208017 in words is "fifty-one billion, seven hundred five million, two hundred eight thousand, seventeen".