72533511533563 has 4 divisors (see below), whose sum is σ = 72549785603880. Its totient is φ = 72517237463248.

The previous prime is 72533511533537. The next prime is 72533511533611. The reversal of 72533511533563 is 36533511533527.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72533511533563 is a prime.

It is a super-2 number, since 2×72533511533563² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72533511533563.

It is not an unprimeable number, because it can be changed into a prime (72533511533863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8137028473 + ... + 8137037386.

It is an arithmetic number, because the mean of its divisors is an integer number (18137446400970).

Almost surely, 2^{72533511533563} is an apocalyptic number.

72533511533563 is a deficient number, since it is larger than the sum of its proper divisors (16274070317).

72533511533563 is a wasteful number, since it uses less digits than its factorization.

72533511533563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16274070316.

The product of its digits is 12757500, while the sum is 52.

The spelling of 72533511533563 in words is "seventy-two trillion, five hundred thirty-three billion, five hundred eleven million, five hundred thirty-three thousand, five hundred sixty-three".