808924849661 has 12 divisors (see below), whose sum is σ = 819514489500. Its totient is φ = 798470382528.

The previous prime is 808924849643. The next prime is 808924849687. The reversal of 808924849661 is 166948429808.

It can be written as a sum of positive squares in 2 ways, for example, as 435138122500 + 373786727161 = 659650^2 + 611381^2 .

It is not a de Polignac number, because 808924849661 - 2³⁸ = 534046942717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808924849261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26377865 + ... + 26408513.

It is an arithmetic number, because the mean of its divisors is an integer number (68292874125).

Almost surely, 2^808924849661 is an apocalyptic number.

It is an amenable number.

808924849661 is a deficient number, since it is larger than the sum of its proper divisors (10589639839).

808924849661 is an equidigital number, since it uses as much as digits as its factorization.

808924849661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35036 (or 34957 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 65.

The spelling of 808924849661 in words is "eight hundred eight billion, nine hundred twenty-four million, eight hundred forty-nine thousand, six hundred sixty-one".