53567233991 has 4 divisors (see below), whose sum is σ = 53587025112. Its totient is φ = 53547442872.

The previous prime is 53567233981. The next prime is 53567234051. The reversal of 53567233991 is 19933276535.

It is a happy number.

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 53567233991 - 2²² = 53563039687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53567233981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9891500 + ... + 9896913.

It is an arithmetic number, because the mean of its divisors is an integer number (13396756278).

Almost surely, 2^53567233991 is an apocalyptic number.

53567233991 is a deficient number, since it is larger than the sum of its proper divisors (19791121).

53567233991 is a wasteful number, since it uses less digits than its factorization.

53567233991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19791120.

The product of its digits is 4592700, while the sum is 53.

The spelling of 53567233991 in words is "fifty-three billion, five hundred sixty-seven million, two hundred thirty-three thousand, nine hundred ninety-one".