72277529257 has 2 divisors, whose sum is σ = 72277529258. Its totient is φ = 72277529256.

The previous prime is 72277529179. The next prime is 72277529267. The reversal of 72277529257 is 75292577227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59804213401 + 12473315856 = 244549^2 + 111684^2 .

It is a cyclic number.

It is not a de Polignac number, because 72277529257 - 2²³ = 72269140649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72277529198 and 72277529207.

It is not a weakly prime, because it can be changed into another prime (72277529267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36138764628 + 36138764629.

It is an arithmetic number, because the mean of its divisors is an integer number (36138764629).

Almost surely, 2^72277529257 is an apocalyptic number.

It is an amenable number.

72277529257 is a deficient number, since it is larger than the sum of its proper divisors (1).

72277529257 is an equidigital number, since it uses as much as digits as its factorization.

72277529257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8643600, while the sum is 55.

The spelling of 72277529257 in words is "seventy-two billion, two hundred seventy-seven million, five hundred twenty-nine thousand, two hundred fifty-seven".