32011256861 has 2 divisors, whose sum is σ = 32011256862. Its totient is φ = 32011256860.

The previous prime is 32011256843. The next prime is 32011256873. The reversal of 32011256861 is 16865211023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17723596900 + 14287659961 = 133130^2 + 119531^2 .

It is an emirp because it is prime and its reverse (16865211023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32011256861 - 2¹⁴ = 32011240477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32011256821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16005628430 + 16005628431.

It is an arithmetic number, because the mean of its divisors is an integer number (16005628431).

Almost surely, 2^32011256861 is an apocalyptic number.

It is an amenable number.

32011256861 is a deficient number, since it is larger than the sum of its proper divisors (1).

32011256861 is an equidigital number, since it uses as much as digits as its factorization.

32011256861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

Adding to 32011256861 its reverse (16865211023), we get a palindrome (48876467884).

The spelling of 32011256861 in words is "thirty-two billion, eleven million, two hundred fifty-six thousand, eight hundred sixty-one".