10646551 has 4 divisors (see below), whose sum is σ = 10654600. Its totient is φ = 10638504.

The previous prime is 10646549. The next prime is 10646561. The reversal of 10646551 is 15564601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15564601 = 13 ⋅1197277.

It is a cyclic number.

It is not a de Polignac number, because 10646551 - 2¹ = 10646549 is a prime.

It is a super-2 number, since 2×10646551² = 226698096391202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10646561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521 + ... + 4858.

It is an arithmetic number, because the mean of its divisors is an integer number (2663650).

Almost surely, 2^10646551 is an apocalyptic number.

10646551 is a deficient number, since it is larger than the sum of its proper divisors (8049).

10646551 is an equidigital number, since it uses as much as digits as its factorization.

10646551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8048.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 10646551 is about 3262.9053004953. The cubic root of 10646551 is about 219.9900202085.

The spelling of 10646551 in words is "ten million, six hundred forty-six thousand, five hundred fifty-one".