73647002321 has 2 divisors, whose sum is σ = 73647002322. Its totient is φ = 73647002320.

The previous prime is 73647002291. The next prime is 73647002329. The reversal of 73647002321 is 12320074637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56100291025 + 17546711296 = 236855^2 + 132464^2 .

It is a cyclic number.

It is not a de Polignac number, because 73647002321 - 2⁶ = 73647002257 is a prime.

It is not a weakly prime, because it can be changed into another prime (73647002329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36823501160 + 36823501161.

It is an arithmetic number, because the mean of its divisors is an integer number (36823501161).

Almost surely, 2^73647002321 is an apocalyptic number.

It is an amenable number.

73647002321 is a deficient number, since it is larger than the sum of its proper divisors (1).

73647002321 is an equidigital number, since it uses as much as digits as its factorization.

73647002321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

Adding to 73647002321 its reverse (12320074637), we get a palindrome (85967076958).

The spelling of 73647002321 in words is "seventy-three billion, six hundred forty-seven million, two thousand, three hundred twenty-one".