51075945792505 has 16 divisors (see below), whose sum is σ = 62948252460240. Its totient is φ = 39756032692992.

The previous prime is 51075945792499. The next prime is 51075945792511. The reversal of 51075945792505 is 50529754957015.

It is an interprime number because it is at equal distance from previous prime (51075945792499) and next prime (51075945792511).

It can be written as a sum of positive squares in 8 ways, for example, as 13204771342569 + 37871174449936 = 3633837^2 + 6153956^2 .

It is a cyclic number.

It is not a de Polignac number, because 51075945792505 - 2¹³ = 51075945784313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18976591 + ... + 21500299.

It is an arithmetic number, because the mean of its divisors is an integer number (3934265778765).

Almost surely, 2^{51075945792505} is an apocalyptic number.

It is an amenable number.

51075945792505 is a deficient number, since it is larger than the sum of its proper divisors (11872306667735).

51075945792505 is a wasteful number, since it uses less digits than its factorization.

51075945792505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633148.

The product of its (nonzero) digits is 99225000, while the sum is 64.

The spelling of 51075945792505 in words is "fifty-one trillion, seventy-five billion, nine hundred forty-five million, seven hundred ninety-two thousand, five hundred five".