32557823381 has 2 divisors, whose sum is σ = 32557823382. Its totient is φ = 32557823380.

The previous prime is 32557823371. The next prime is 32557823461. The reversal of 32557823381 is 18332875523.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31841190481 + 716632900 = 178441^2 + 26770^2 .

It is a cyclic number.

It is not a de Polignac number, because 32557823381 - 2¹⁴ = 32557806997 is a prime.

It is a super-2 number, since 2×32557823381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32557823341) 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, 16278911690 + 16278911691.

It is an arithmetic number, because the mean of its divisors is an integer number (16278911691).

Almost surely, 2^32557823381 is an apocalyptic number.

It is an amenable number.

32557823381 is a deficient number, since it is larger than the sum of its proper divisors (1).

32557823381 is an equidigital number, since it uses as much as digits as its factorization.

32557823381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 47.

The spelling of 32557823381 in words is "thirty-two billion, five hundred fifty-seven million, eight hundred twenty-three thousand, three hundred eighty-one".