72220611605651 has 2 divisors, whose sum is σ = 72220611605652. Its totient is φ = 72220611605650.

The previous prime is 72220611605617. The next prime is 72220611605663. The reversal of 72220611605651 is 15650611602227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72220611605651 - 2¹⁴ = 72220611589267 is a prime.

It is not a weakly prime, because it can be changed into another prime (72220611605671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36110305802825 + 36110305802826.

It is an arithmetic number, because the mean of its divisors is an integer number (36110305802826).

Almost surely, 2^{72220611605651} is an apocalyptic number.

72220611605651 is a deficient number, since it is larger than the sum of its proper divisors (1).

72220611605651 is an equidigital number, since it uses as much as digits as its factorization.

72220611605651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 72220611605651 in words is "seventy-two trillion, two hundred twenty billion, six hundred eleven million, six hundred five thousand, six hundred fifty-one".