53156287865 has 4 divisors (see below), whose sum is σ = 63787545444. Its totient is φ = 42525030288.

The previous prime is 53156287823. The next prime is 53156287879. The reversal of 53156287865 is 56878265135.

It is a happy number.

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 22059081529 + 31097206336 = 148523^2 + 176344^2 .

It is a cyclic number.

It is not a de Polignac number, because 53156287865 - 2¹⁸ = 53156025721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53156287865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5315628782 + ... + 5315628791.

It is an arithmetic number, because the mean of its divisors is an integer number (15946886361).

Almost surely, 2^53156287865 is an apocalyptic number.

It is an amenable number.

53156287865 is a deficient number, since it is larger than the sum of its proper divisors (10631257579).

53156287865 is a wasteful number, since it uses less digits than its factorization.

53156287865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10631257578.

The product of its digits is 12096000, while the sum is 56.

The spelling of 53156287865 in words is "fifty-three billion, one hundred fifty-six million, two hundred eighty-seven thousand, eight hundred sixty-five".