72161020879 has 2 divisors, whose sum is σ = 72161020880. Its totient is φ = 72161020878.

The previous prime is 72161020871. The next prime is 72161020891. The reversal of 72161020879 is 97802016127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72161020879 - 2³ = 72161020871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72161020871) 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, 36080510439 + 36080510440.

It is an arithmetic number, because the mean of its divisors is an integer number (36080510440).

Almost surely, 2^72161020879 is an apocalyptic number.

72161020879 is a deficient number, since it is larger than the sum of its proper divisors (1).

72161020879 is an equidigital number, since it uses as much as digits as its factorization.

72161020879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 72161020879 in words is "seventy-two billion, one hundred sixty-one million, twenty thousand, eight hundred seventy-nine".