10644155 has 4 divisors (see below), whose sum is σ = 12772992. Its totient is φ = 8515320.

The previous prime is 10644121. The next prime is 10644163. The reversal of 10644155 is 55144601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55144601 = 353 ⋅156217.

It is a de Polignac number, because none of the positive numbers 2^k-10644155 is a prime.

It is a super-2 number, since 2×10644155² = 226596071328050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064411 + ... + 1064420.

It is an arithmetic number, because the mean of its divisors is an integer number (3193248).

Almost surely, 2^10644155 is an apocalyptic number.

10644155 is a deficient number, since it is larger than the sum of its proper divisors (2128837).

10644155 is an equidigital number, since it uses as much as digits as its factorization.

10644155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128836.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 10644155 is about 3262.5381223826. The cubic root of 10644155 is about 219.9735160957.

Adding to 10644155 its reverse (55144601), we get a palindrome (65788756).

The spelling of 10644155 in words is "ten million, six hundred forty-four thousand, one hundred fifty-five".