72411624156221 has 12 divisors (see below), whose sum is σ = 84725460590112. Its totient is φ = 60623685329256.

The previous prime is 72411624156211. The next prime is 72411624156323. The reversal of 72411624156221 is 12265142611427.

It is a de Polignac number, because none of the positive numbers 2^k-72411624156221 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 (72411624156211) 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 11 ways as a sum of consecutive naturals, for example, 2797314731 + ... + 2797340616.

It is an arithmetic number, because the mean of its divisors is an integer number (7060455049176).

Almost surely, 2^{72411624156221} is an apocalyptic number.

It is an amenable number.

72411624156221 is a deficient number, since it is larger than the sum of its proper divisors (12313836433891).

72411624156221 is an equidigital number, since it uses as much as digits as its factorization.

72411624156221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594655440 (or 5594655397 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

Adding to 72411624156221 its reverse (12265142611427), we get a palindrome (84676766767648).

The spelling of 72411624156221 in words is "seventy-two trillion, four hundred eleven billion, six hundred twenty-four million, one hundred fifty-six thousand, two hundred twenty-one".