91801701653 has 2 divisors, whose sum is σ = 91801701654. Its totient is φ = 91801701652.

The previous prime is 91801701619. The next prime is 91801701689. The reversal of 91801701653 is 35610710819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89554752049 + 2246949604 = 299257^2 + 47402^2 .

It is a cyclic number.

It is not a de Polignac number, because 91801701653 - 2¹⁶ = 91801636117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91801701653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91401701653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45900850826 + 45900850827.

It is an arithmetic number, because the mean of its divisors is an integer number (45900850827).

Almost surely, 2^91801701653 is an apocalyptic number.

It is an amenable number.

91801701653 is a deficient number, since it is larger than the sum of its proper divisors (1).

91801701653 is an equidigital number, since it uses as much as digits as its factorization.

91801701653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 91801701653 in words is "ninety-one billion, eight hundred one million, seven hundred one thousand, six hundred fifty-three".