73503775081 has 4 divisors (see below), whose sum is σ = 80185936464. Its totient is φ = 66821613700.

The previous prime is 73503775073. The next prime is 73503775097. The reversal of 73503775081 is 18057730537.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73503775081 - 2³ = 73503775073 is a prime.

It is a super-2 number, since 2×73503775081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73503775481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3341080675 + ... + 3341080696.

It is an arithmetic number, because the mean of its divisors is an integer number (20046484116).

Almost surely, 2^73503775081 is an apocalyptic number.

It is an amenable number.

73503775081 is a deficient number, since it is larger than the sum of its proper divisors (6682161383).

73503775081 is a wasteful number, since it uses less digits than its factorization.

73503775081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682161382.

The product of its (nonzero) digits is 617400, while the sum is 46.

The spelling of 73503775081 in words is "seventy-three billion, five hundred three million, seven hundred seventy-five thousand, eighty-one".