72133765553 has 4 divisors (see below), whose sum is σ = 74460661248. Its totient is φ = 69806869860.

The previous prime is 72133765549. The next prime is 72133765591. The reversal of 72133765553 is 35556733127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35556733127 = 1031 ⋅34487617.

It is a cyclic number.

It is not a de Polignac number, because 72133765553 - 2² = 72133765549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72133765498 and 72133765507.

It is not an unprimeable number, because it can be changed into a prime (72133785553) by changing a digit.

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, 1163447801 + ... + 1163447862.

It is an arithmetic number, because the mean of its divisors is an integer number (18615165312).

Almost surely, 2^72133765553 is an apocalyptic number.

It is an amenable number.

72133765553 is a deficient number, since it is larger than the sum of its proper divisors (2326895695).

72133765553 is a wasteful number, since it uses less digits than its factorization.

72133765553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326895694.

The product of its digits is 1984500, while the sum is 47.

The spelling of 72133765553 in words is "seventy-two billion, one hundred thirty-three million, seven hundred sixty-five thousand, five hundred fifty-three".