72300128503 has 4 divisors (see below), whose sum is σ = 72305388648. Its totient is φ = 72294868360.

The previous prime is 72300128501. The next prime is 72300128507. The reversal of 72300128503 is 30582100327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30582100327 = 61 ⋅501345907.

It is a cyclic number.

It is not a de Polignac number, because 72300128503 - 2¹ = 72300128501 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 (72300128501) 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, 2609401 + ... + 2636962.

It is an arithmetic number, because the mean of its divisors is an integer number (18076347162).

Almost surely, 2^72300128503 is an apocalyptic number.

72300128503 is a deficient number, since it is larger than the sum of its proper divisors (5260145).

72300128503 is a wasteful number, since it uses less digits than its factorization.

72300128503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260144.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 72300128503 in words is "seventy-two billion, three hundred million, one hundred twenty-eight thousand, five hundred three".