72693833261 has 4 divisors (see below), whose sum is σ = 83078666592. Its totient is φ = 62308999932.

The previous prime is 72693833257. The next prime is 72693833273. The reversal of 72693833261 is 16233839627.

It is a happy number.

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: 16233839627 = 2027 ⋅8008801.

It is a cyclic number.

It is not a de Polignac number, because 72693833261 - 2² = 72693833257 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 (72693833291) 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, 5192416655 + ... + 5192416668.

It is an arithmetic number, because the mean of its divisors is an integer number (20769666648).

Almost surely, 2^72693833261 is an apocalyptic number.

It is an amenable number.

72693833261 is a deficient number, since it is larger than the sum of its proper divisors (10384833331).

72693833261 is a wasteful number, since it uses less digits than its factorization.

72693833261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384833330.

The product of its digits is 1959552, while the sum is 50.

The spelling of 72693833261 in words is "seventy-two billion, six hundred ninety-three million, eight hundred thirty-three thousand, two hundred sixty-one".