72245816689793 has 4 divisors (see below), whose sum is σ = 76495570612740. Its totient is φ = 67996062766848.

The previous prime is 72245816689741. The next prime is 72245816689799. The reversal of 72245816689793 is 39798661854227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30250077000049 + 41995739689744 = 5500007^2 + 6480412^2 .

It is a cyclic number.

It is not a de Polignac number, because 72245816689793 - 2¹⁸ = 72245816427649 is a prime.

It is a super-3 number, since 3×72245816689793³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72245816689799) 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, 2124876961448 + ... + 2124876961481.

It is an arithmetic number, because the mean of its divisors is an integer number (19123892653185).

Almost surely, 2^{72245816689793} is an apocalyptic number.

It is an amenable number.

72245816689793 is a deficient number, since it is larger than the sum of its proper divisors (4249753922947).

72245816689793 is a wasteful number, since it uses less digits than its factorization.

72245816689793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249753922946.

The product of its digits is 2194698240, while the sum is 77.

The spelling of 72245816689793 in words is "seventy-two trillion, two hundred forty-five billion, eight hundred sixteen million, six hundred eighty-nine thousand, seven hundred ninety-three".