91928583641 has 2 divisors, whose sum is σ = 91928583642. Its totient is φ = 91928583640.

The previous prime is 91928583613. The next prime is 91928583647. The reversal of 91928583641 is 14638582919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91812030025 + 116553616 = 303005^2 + 10796^2 .

It is an emirp because it is prime and its reverse (14638582919) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91928583641 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91928583647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45964291820 + 45964291821.

It is an arithmetic number, because the mean of its divisors is an integer number (45964291821).

Almost surely, 2^91928583641 is an apocalyptic number.

It is an amenable number.

91928583641 is a deficient number, since it is larger than the sum of its proper divisors (1).

91928583641 is an equidigital number, since it uses as much as digits as its factorization.

91928583641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 56.

The spelling of 91928583641 in words is "ninety-one billion, nine hundred twenty-eight million, five hundred eighty-three thousand, six hundred forty-one".