73530778339 has 2 divisors, whose sum is σ = 73530778340. Its totient is φ = 73530778338.

The previous prime is 73530778319. The next prime is 73530778357. The reversal of 73530778339 is 93387703537.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73530778339 - 2¹³ = 73530770147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73530778339.

It is not a weakly prime, because it can be changed into another prime (73530778319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36765389169 + 36765389170.

It is an arithmetic number, because the mean of its divisors is an integer number (36765389170).

Almost surely, 2^73530778339 is an apocalyptic number.

73530778339 is a deficient number, since it is larger than the sum of its proper divisors (1).

73530778339 is an equidigital number, since it uses as much as digits as its factorization.

73530778339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10001880, while the sum is 55.

The spelling of 73530778339 in words is "seventy-three billion, five hundred thirty million, seven hundred seventy-eight thousand, three hundred thirty-nine".