10291285665 has 48 divisors (see below), whose sum is σ = 18953298000. Its totient is φ = 5165710848.

The previous prime is 10291285643. The next prime is 10291285673. The reversal of 10291285665 is 56658219201.

It can be written as a sum of positive squares in 8 ways, for example, as 834112161 + 9457173504 = 28881^2 + 97248^2 .

It is not a de Polignac number, because 10291285665 - 2⁵ = 10291285633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 10291285665.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197811 + ... + 244359.

It is an arithmetic number, because the mean of its divisors is an integer number (394860375).

Almost surely, 2^10291285665 is an apocalyptic number.

10291285665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10291285665 is a deficient number, since it is larger than the sum of its proper divisors (8662012335).

10291285665 is an equidigital number, since it uses as much as digits as its factorization.

10291285665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46611 (or 46574 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 10291285665 in words is "ten billion, two hundred ninety-one million, two hundred eighty-five thousand, six hundred sixty-five".