73403206511 has 4 divisors (see below), whose sum is σ = 73502535000. Its totient is φ = 73303878024.

The previous prime is 73403206417. The next prime is 73403206523. The reversal of 73403206511 is 11560230437.

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

It is a cyclic number.

It is not a de Polignac number, because 73403206511 - 2³⁰ = 72329464687 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 (73403206571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49663136 + ... + 49664613.

It is an arithmetic number, because the mean of its divisors is an integer number (18375633750).

Almost surely, 2^73403206511 is an apocalyptic number.

73403206511 is a deficient number, since it is larger than the sum of its proper divisors (99328489).

73403206511 is an equidigital number, since it uses as much as digits as its factorization.

73403206511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99328488.

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 73403206511 its reverse (11560230437), we get a palindrome (84963436948).

The spelling of 73403206511 in words is "seventy-three billion, four hundred three million, two hundred six thousand, five hundred eleven".