72577805249 has 4 divisors (see below), whose sum is σ = 72585670080. Its totient is φ = 72569940420.

The previous prime is 72577805197. The next prime is 72577805257. The reversal of 72577805249 is 94250877527.

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: 94250877527 = 15859 ⋅5943053.

It is a cyclic number.

It is not a de Polignac number, because 72577805249 - 2²⁰ = 72576756673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72577805194 and 72577805203.

It is not an unprimeable number, because it can be changed into a prime (72577805269) 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, 3918557 + ... + 3937034.

It is an arithmetic number, because the mean of its divisors is an integer number (18146417520).

Almost surely, 2^72577805249 is an apocalyptic number.

It is an amenable number.

72577805249 is a deficient number, since it is larger than the sum of its proper divisors (7864831).

72577805249 is an equidigital number, since it uses as much as digits as its factorization.

72577805249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864830.

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 72577805249 in words is "seventy-two billion, five hundred seventy-seven million, eight hundred five thousand, two hundred forty-nine".