72478440323 has 2 divisors, whose sum is σ = 72478440324. Its totient is φ = 72478440322.

The previous prime is 72478440277. The next prime is 72478440337. The reversal of 72478440323 is 32304487427.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72478440323 is a prime.

It is not a weakly prime, because it can be changed into another prime (72478340323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36239220161 + 36239220162.

It is an arithmetic number, because the mean of its divisors is an integer number (36239220162).

Almost surely, 2^72478440323 is an apocalyptic number.

72478440323 is a deficient number, since it is larger than the sum of its proper divisors (1).

72478440323 is an equidigital number, since it uses as much as digits as its factorization.

72478440323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 44.

The spelling of 72478440323 in words is "seventy-two billion, four hundred seventy-eight million, four hundred forty thousand, three hundred twenty-three".