72478440337 has 2 divisors, whose sum is σ = 72478440338. Its totient is φ = 72478440336.

The previous prime is 72478440323. The next prime is 72478440361. The reversal of 72478440337 is 73304487427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64328684161 + 8149756176 = 253631^2 + 90276^2 .

It is a cyclic number.

It is not a de Polignac number, because 72478440337 - 2¹⁵ = 72478407569 is a prime.

It is not a weakly prime, because it can be changed into another prime (72478440737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36239220168 + 36239220169.

It is an arithmetic number, because the mean of its divisors is an integer number (36239220169).

Almost surely, 2^72478440337 is an apocalyptic number.

It is an amenable number.

72478440337 is a deficient number, since it is larger than the sum of its proper divisors (1).

72478440337 is an equidigital number, since it uses as much as digits as its factorization.

72478440337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 49.

The spelling of 72478440337 in words is "seventy-two billion, four hundred seventy-eight million, four hundred forty thousand, three hundred thirty-seven".