73334991281 has 2 divisors, whose sum is σ = 73334991282. Its totient is φ = 73334991280.

The previous prime is 73334991269. The next prime is 73334991307. The reversal of 73334991281 is 18219943337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56308917025 + 17026074256 = 237295^2 + 130484^2 .

It is a cyclic number.

It is not a de Polignac number, because 73334991281 - 2¹⁸ = 73334729137 is a prime.

It is a super-2 number, since 2×73334991281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73334991211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36667495640 + 36667495641.

It is an arithmetic number, because the mean of its divisors is an integer number (36667495641).

Almost surely, 2^73334991281 is an apocalyptic number.

It is an amenable number.

73334991281 is a deficient number, since it is larger than the sum of its proper divisors (1).

73334991281 is an equidigital number, since it uses as much as digits as its factorization.

73334991281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The spelling of 73334991281 in words is "seventy-three billion, three hundred thirty-four million, nine hundred ninety-one thousand, two hundred eighty-one".