72300128501 has 2 divisors, whose sum is σ = 72300128502. Its totient is φ = 72300128500.

The previous prime is 72300128477. The next prime is 72300128507. The reversal of 72300128501 is 10582100327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41585813476 + 30714315025 = 203926^2 + 175255^2 .

It is a cyclic number.

It is not a de Polignac number, because 72300128501 - 2⁶ = 72300128437 is a prime.

It is a super-2 number, since 2×72300128501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72300128507) 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 as a sum of consecutive naturals, namely, 36150064250 + 36150064251.

It is an arithmetic number, because the mean of its divisors is an integer number (36150064251).

Almost surely, 2^72300128501 is an apocalyptic number.

It is an amenable number.

72300128501 is a deficient number, since it is larger than the sum of its proper divisors (1).

72300128501 is an equidigital number, since it uses as much as digits as its factorization.

72300128501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 72300128501 its reverse (10582100327), we get a palindrome (82882228828).

The spelling of 72300128501 in words is "seventy-two billion, three hundred million, one hundred twenty-eight thousand, five hundred one".