72882161880421 has 2 divisors, whose sum is σ = 72882161880422. Its totient is φ = 72882161880420.

The previous prime is 72882161880391. The next prime is 72882161880469. The reversal of 72882161880421 is 12408816128827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51546871548225 + 21335290332196 = 7179615^2 + 4619014^2 .

It is a cyclic number.

It is not a de Polignac number, because 72882161880421 - 2³³ = 72873571945829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72882161880481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36441080940210 + 36441080940211.

It is an arithmetic number, because the mean of its divisors is an integer number (36441080940211).

Almost surely, 2^{72882161880421} is an apocalyptic number.

It is an amenable number.

72882161880421 is a deficient number, since it is larger than the sum of its proper divisors (1).

72882161880421 is an equidigital number, since it uses as much as digits as its factorization.

72882161880421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5505024, while the sum is 58.

The spelling of 72882161880421 in words is "seventy-two trillion, eight hundred eighty-two billion, one hundred sixty-one million, eight hundred eighty thousand, four hundred twenty-one".