32395637663981 has 2 divisors, whose sum is σ = 32395637663982. Its totient is φ = 32395637663980.

The previous prime is 32395637663951. The next prime is 32395637664059. The reversal of 32395637663981 is 18936673659323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27274767375625 + 5120870288356 = 5222525^2 + 2262934^2 .

It is a cyclic number.

It is not a de Polignac number, because 32395637663981 - 2²² = 32395633469677 is a prime.

It is a super-2 number, since 2×32395637663981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32395637663951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16197818831990 + 16197818831991.

It is an arithmetic number, because the mean of its divisors is an integer number (16197818831991).

Almost surely, 2^{32395637663981} is an apocalyptic number.

It is an amenable number.

32395637663981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32395637663981 is an equidigital number, since it uses as much as digits as its factorization.

32395637663981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793618560, while the sum is 71.

The spelling of 32395637663981 in words is "thirty-two trillion, three hundred ninety-five billion, six hundred thirty-seven million, six hundred sixty-three thousand, nine hundred eighty-one".