51756104481085 has 4 divisors (see below), whose sum is σ = 62107325377308. Its totient is φ = 41404883584864.

The previous prime is 51756104481071. The next prime is 51756104481121. The reversal of 51756104481085 is 58018440165715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19348975170009 + 32407129311076 = 4398747^2 + 5692726^2 .

It is a cyclic number.

It is not a de Polignac number, because 51756104481085 - 2¹³ = 51756104472893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5175610448104 + ... + 5175610448113.

It is an arithmetic number, because the mean of its divisors is an integer number (15526831344327).

Almost surely, 2^{51756104481085} is an apocalyptic number.

It is an amenable number.

51756104481085 is a deficient number, since it is larger than the sum of its proper divisors (10351220896223).

51756104481085 is a wasteful number, since it uses less digits than its factorization.

51756104481085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351220896222.

The product of its (nonzero) digits is 5376000, while the sum is 55.

The spelling of 51756104481085 in words is "fifty-one trillion, seven hundred fifty-six billion, one hundred four million, four hundred eighty-one thousand, eighty-five".