73405266533 has 4 divisors (see below), whose sum is σ = 73568753100. Its totient is φ = 73241779968.

The previous prime is 73405266499. The next prime is 73405266541. The reversal of 73405266533 is 33566250437.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28243491364 + 45161775169 = 168058^2 + 212513^2 .

It is a cyclic number.

It is not a de Polignac number, because 73405266533 - 2¹⁸ = 73405004389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73405266593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81742610 + ... + 81743507.

It is an arithmetic number, because the mean of its divisors is an integer number (18392188275).

Almost surely, 2^73405266533 is an apocalyptic number.

It is an amenable number.

73405266533 is a deficient number, since it is larger than the sum of its proper divisors (163486567).

73405266533 is a wasteful number, since it uses less digits than its factorization.

73405266533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163486566.

The product of its (nonzero) digits is 1360800, while the sum is 44.

The spelling of 73405266533 in words is "seventy-three billion, four hundred five million, two hundred sixty-six thousand, five hundred thirty-three".