72267503881 has 2 divisors, whose sum is σ = 72267503882. Its totient is φ = 72267503880.

The previous prime is 72267503821. The next prime is 72267503899. The reversal of 72267503881 is 18830576227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52022767225 + 20244736656 = 228085^2 + 142284^2 .

It is a cyclic number.

It is not a de Polignac number, because 72267503881 - 2⁹ = 72267503369 is a prime.

It is a super-2 number, since 2×72267503881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72267503821) 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, 36133751940 + 36133751941.

It is an arithmetic number, because the mean of its divisors is an integer number (36133751941).

Almost surely, 2^72267503881 is an apocalyptic number.

It is an amenable number.

72267503881 is a deficient number, since it is larger than the sum of its proper divisors (1).

72267503881 is an equidigital number, since it uses as much as digits as its factorization.

72267503881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 72267503881 in words is "seventy-two billion, two hundred sixty-seven million, five hundred three thousand, eight hundred eighty-one".