10365821861 has 16 divisors (see below), whose sum is σ = 10986928128. Its totient is φ = 9759380400.

The previous prime is 10365821833. The next prime is 10365821863. The reversal of 10365821861 is 16812856301.

It is a cyclic number.

It is not a de Polignac number, because 10365821861 - 2¹⁴ = 10365805477 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 (10365821863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051646 + ... + 1061456.

It is an arithmetic number, because the mean of its divisors is an integer number (686683008).

Almost surely, 2^10365821861 is an apocalyptic number.

It is an amenable number.

10365821861 is a deficient number, since it is larger than the sum of its proper divisors (621106267).

10365821861 is an equidigital number, since it uses as much as digits as its factorization.

10365821861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 10365821861 in words is "ten billion, three hundred sixty-five million, eight hundred twenty-one thousand, eight hundred sixty-one".