72274208777 has 2 divisors, whose sum is σ = 72274208778. Its totient is φ = 72274208776.

The previous prime is 72274208761. The next prime is 72274208807. The reversal of 72274208777 is 77780247227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48324789241 + 23949419536 = 219829^2 + 154756^2 .

It is an emirp because it is prime and its reverse (77780247227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72274208777 - 2⁴ = 72274208761 is a prime.

It is a super-2 number, since 2×72274208777² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72274208477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36137104388 + 36137104389.

It is an arithmetic number, because the mean of its divisors is an integer number (36137104389).

Almost surely, 2^72274208777 is an apocalyptic number.

It is an amenable number.

72274208777 is a deficient number, since it is larger than the sum of its proper divisors (1).

72274208777 is an equidigital number, since it uses as much as digits as its factorization.

72274208777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4302592, while the sum is 53.

The spelling of 72274208777 in words is "seventy-two billion, two hundred seventy-four million, two hundred eight thousand, seven hundred seventy-seven".