53811236247 has 4 divisors (see below), whose sum is σ = 71748315000. Its totient is φ = 35874157496.

The previous prime is 53811236239. The next prime is 53811236291. The reversal of 53811236247 is 74263211835.

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

It is a cyclic number.

It is not a de Polignac number, because 53811236247 - 2³ = 53811236239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53811236199 and 53811236208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53811236207) by changing a digit.

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, 8968539372 + ... + 8968539377.

It is an arithmetic number, because the mean of its divisors is an integer number (17937078750).

Almost surely, 2^53811236247 is an apocalyptic number.

53811236247 is a deficient number, since it is larger than the sum of its proper divisors (17937078753).

53811236247 is a wasteful number, since it uses less digits than its factorization.

53811236247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17937078752.

The product of its digits is 241920, while the sum is 42.

The spelling of 53811236247 in words is "fifty-three billion, eight hundred eleven million, two hundred thirty-six thousand, two hundred forty-seven".