51636355006505 has 4 divisors (see below), whose sum is σ = 61963626007812. Its totient is φ = 41309084005200.

The previous prime is 51636355006417. The next prime is 51636355006583. The reversal of 51636355006505 is 50560055363615.

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 6728088948736 + 44908266057769 = 2593856^2 + 6701363^2 .

It is not a de Polignac number, because 51636355006505 - 2²² = 51636350812201 is a prime.

It is a Duffinian 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, 5163635500646 + ... + 5163635500655.

It is an arithmetic number, because the mean of its divisors is an integer number (15490906501953).

Almost surely, 2^{51636355006505} is an apocalyptic number.

It is an amenable number.

51636355006505 is a deficient number, since it is larger than the sum of its proper divisors (10327271001307).

51636355006505 is a wasteful number, since it uses less digits than its factorization.

51636355006505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10327271001306.

The product of its (nonzero) digits is 6075000, while the sum is 50.

The spelling of 51636355006505 in words is "fifty-one trillion, six hundred thirty-six billion, three hundred fifty-five million, six thousand, five hundred five".