51456059605 has 4 divisors (see below), whose sum is σ = 61747271532. Its totient is φ = 41164847680.

The previous prime is 51456059593. The next prime is 51456059647. The reversal of 51456059605 is 50695065415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50695065415 = 5 ⋅10139013083.

It can be written as a sum of positive squares in 2 ways, for example, as 39177868356 + 12278191249 = 197934^2 + 110807^2 .

It is not a de Polignac number, because 51456059605 - 2⁹ = 51456059093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5145605956 + ... + 5145605965.

It is an arithmetic number, because the mean of its divisors is an integer number (15436817883).

Almost surely, 2^51456059605 is an apocalyptic number.

It is an amenable number.

51456059605 is a deficient number, since it is larger than the sum of its proper divisors (10291211927).

51456059605 is a wasteful number, since it uses less digits than its factorization.

51456059605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10291211926.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 51456059605 in words is "fifty-one billion, four hundred fifty-six million, fifty-nine thousand, six hundred five".