432661181521 has 2 divisors, whose sum is σ = 432661181522. Its totient is φ = 432661181520.

The previous prime is 432661181503. The next prime is 432661181611. The reversal of 432661181521 is 125181166234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289186893121 + 143474288400 = 537761^2 + 378780^2 .

It is a cyclic number.

It is not a de Polignac number, because 432661181521 - 2¹¹ = 432661179473 is a prime.

It is not a weakly prime, because it can be changed into another prime (432661181501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216330590760 + 216330590761.

It is an arithmetic number, because the mean of its divisors is an integer number (216330590761).

Almost surely, 2^432661181521 is an apocalyptic number.

It is an amenable number.

432661181521 is a deficient number, since it is larger than the sum of its proper divisors (1).

432661181521 is an equidigital number, since it uses as much as digits as its factorization.

432661181521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The spelling of 432661181521 in words is "four hundred thirty-two billion, six hundred sixty-one million, one hundred eighty-one thousand, five hundred twenty-one".