32615873981 has 2 divisors, whose sum is σ = 32615873982. Its totient is φ = 32615873980.

The previous prime is 32615873921. The next prime is 32615873987. The reversal of 32615873981 is 18937851623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30447109081 + 2168764900 = 174491^2 + 46570^2 .

It is an emirp because it is prime and its reverse (18937851623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32615873981 - 2¹⁰ = 32615872957 is a prime.

It is a super-2 number, since 2×32615873981² (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 (32615873987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16307936990 + 16307936991.

It is an arithmetic number, because the mean of its divisors is an integer number (16307936991).

Almost surely, 2^32615873981 is an apocalyptic number.

It is an amenable number.

32615873981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32615873981 is an equidigital number, since it uses as much as digits as its factorization.

32615873981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The spelling of 32615873981 in words is "thirty-two billion, six hundred fifteen million, eight hundred seventy-three thousand, nine hundred eighty-one".