72277220740247 has 4 divisors (see below), whose sum is σ = 73089324344160. Its totient is φ = 71465117136336.

The previous prime is 72277220740217. The next prime is 72277220740267. The reversal of 72277220740247 is 74204702277227.

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

It is a cyclic number.

It is not a de Polignac number, because 72277220740247 - 2²⁰ = 72277219691671 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 (72277220740217) 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, 406051801823 + ... + 406051802000.

It is an arithmetic number, because the mean of its divisors is an integer number (18272331086040).

Almost surely, 2^{72277220740247} is an apocalyptic number.

72277220740247 is a deficient number, since it is larger than the sum of its proper divisors (812103603913).

72277220740247 is an equidigital number, since it uses as much as digits as its factorization.

72277220740247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812103603912.

The product of its (nonzero) digits is 8605184, while the sum is 53.

The spelling of 72277220740247 in words is "seventy-two trillion, two hundred seventy-seven billion, two hundred twenty million, seven hundred forty thousand, two hundred forty-seven".