72140622481 has 2 divisors, whose sum is σ = 72140622482. Its totient is φ = 72140622480.

The previous prime is 72140622451. The next prime is 72140622553. The reversal of 72140622481 is 18422604127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69951786256 + 2188836225 = 264484^2 + 46785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72140622481 is a prime.

It is a super-2 number, since 2×72140622481² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72140622481.

It is not a weakly prime, because it can be changed into another prime (72140622451) 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 as a sum of consecutive naturals, namely, 36070311240 + 36070311241.

It is an arithmetic number, because the mean of its divisors is an integer number (36070311241).

Almost surely, 2^72140622481 is an apocalyptic number.

It is an amenable number.

72140622481 is a deficient number, since it is larger than the sum of its proper divisors (1).

72140622481 is an equidigital number, since it uses as much as digits as its factorization.

72140622481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 37.

The spelling of 72140622481 in words is "seventy-two billion, one hundred forty million, six hundred twenty-two thousand, four hundred eighty-one".