10636813665 has 24 divisors (see below), whose sum is σ = 18547558848. Its totient is φ = 5638993440.

The previous prime is 10636813631. The next prime is 10636813679. The reversal of 10636813665 is 56631863601.

10636813665 is a `hidden beast` number, since 1 + 0 + 636 + 8 + 1 + 3 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 10636813665 - 2⁸ = 10636813409 is a prime.

It is a super-2 number, since 2×10636813665² (a number of 21 digits) contains 22 as substring.

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 10636813665.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 700191 + ... + 715220.

It is an arithmetic number, because the mean of its divisors is an integer number (772814952).

Almost surely, 2^10636813665 is an apocalyptic number.

10636813665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10636813665 is a deficient number, since it is larger than the sum of its proper divisors (7910745183).

10636813665 is a wasteful number, since it uses less digits than its factorization.

10636813665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415589 (or 1415586 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 10636813665 in words is "ten billion, six hundred thirty-six million, eight hundred thirteen thousand, six hundred sixty-five".