10640321653 has 4 divisors (see below), whose sum is σ = 11458807948. Its totient is φ = 9821835360.

The previous prime is 10640321639. The next prime is 10640321677. The reversal of 10640321653 is 35612304601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35612304601 = 110129 ⋅323369.

It can be written as a sum of positive squares in 2 ways, for example, as 1086823089 + 9553498564 = 32967^2 + 97742^2 .

It is a cyclic number.

It is not a de Polignac number, because 10640321653 - 2⁵ = 10640321621 is a prime.

It is a super-2 number, since 2×10640321653² (a number of 21 digits) 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 (10640321623) 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 3 ways as a sum of consecutive naturals, for example, 409243128 + ... + 409243153.

It is an arithmetic number, because the mean of its divisors is an integer number (2864701987).

Almost surely, 2^10640321653 is an apocalyptic number.

10640321653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

10640321653 is a deficient number, since it is larger than the sum of its proper divisors (818486295).

10640321653 is an equidigital number, since it uses as much as digits as its factorization.

10640321653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818486294.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 10640321653 in words is "ten billion, six hundred forty million, three hundred twenty-one thousand, six hundred fifty-three".