72505011145073 has 4 divisors (see below), whose sum is σ = 78082319694708. Its totient is φ = 66927702595440.

The previous prime is 72505011145069. The next prime is 72505011145079. The reversal of 72505011145073 is 37054111050527.

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 4200273994849 + 68304737150224 = 2049457^2 + 8264668^2 .

It is a cyclic number.

It is not a de Polignac number, because 72505011145073 - 2² = 72505011145069 is a prime.

It is a super-2 number, since 2×72505011145073² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72505011145073.

It is not an unprimeable number, because it can be changed into a prime (72505011145079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788654274798 + ... + 2788654274823.

It is an arithmetic number, because the mean of its divisors is an integer number (19520579923677).

Almost surely, 2^{72505011145073} is an apocalyptic number.

It is an amenable number.

72505011145073 is a deficient number, since it is larger than the sum of its proper divisors (5577308549635).

72505011145073 is a wasteful number, since it uses less digits than its factorization.

72505011145073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577308549634.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 72505011145073 in words is "seventy-two trillion, five hundred five billion, eleven million, one hundred forty-five thousand, seventy-three".