32191660001 has 2 divisors, whose sum is σ = 32191660002. Its totient is φ = 32191660000.

The previous prime is 32191659971. The next prime is 32191660009. The reversal of 32191660001 is 10006619123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30302453776 + 1889206225 = 174076^2 + 43465^2 .

It is an emirp because it is prime and its reverse (10006619123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32191660001 - 2²² = 32187465697 is a prime.

It is not a weakly prime, because it can be changed into another prime (32191660009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16095830000 + 16095830001.

It is an arithmetic number, because the mean of its divisors is an integer number (16095830001).

Almost surely, 2^32191660001 is an apocalyptic number.

It is an amenable number.

32191660001 is a deficient number, since it is larger than the sum of its proper divisors (1).

32191660001 is an equidigital number, since it uses as much as digits as its factorization.

32191660001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 32191660001 in words is "thirty-two billion, one hundred ninety-one million, six hundred sixty thousand, one".