72245156777 has 2 divisors, whose sum is σ = 72245156778. Its totient is φ = 72245156776.

The previous prime is 72245156773. The next prime is 72245156801. The reversal of 72245156777 is 77765154227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69939620521 + 2305536256 = 264461^2 + 48016^2 .

It is a cyclic number.

It is not a de Polignac number, because 72245156777 - 2² = 72245156773 is a prime.

It is not a weakly prime, because it can be changed into another prime (72245156773) 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 as a sum of consecutive naturals, namely, 36122578388 + 36122578389.

It is an arithmetic number, because the mean of its divisors is an integer number (36122578389).

Almost surely, 2^72245156777 is an apocalyptic number.

It is an amenable number.

72245156777 is a deficient number, since it is larger than the sum of its proper divisors (1).

72245156777 is an equidigital number, since it uses as much as digits as its factorization.

72245156777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5762400, while the sum is 53.

The spelling of 72245156777 in words is "seventy-two billion, two hundred forty-five million, one hundred fifty-six thousand, seven hundred seventy-seven".