10640245261 has 16 divisors (see below), whose sum is σ = 11120670000. Its totient is φ = 10167607296.

The previous prime is 10640245249. The next prime is 10640245267. The reversal of 10640245261 is 16254204601.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1369444036 + 9270801225 = 37006^2 + 96285^2 .

It is a cyclic number.

It is not a de Polignac number, because 10640245261 - 2⁹ = 10640244749 is a prime.

It is a super-2 number, since 2×10640245261² (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 (10640245267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4452655 + ... + 4455043.

It is an arithmetic number, because the mean of its divisors is an integer number (695041875).

Almost surely, 2^10640245261 is an apocalyptic number.

It is an amenable number.

10640245261 is a deficient number, since it is larger than the sum of its proper divisors (480424739).

10640245261 is a wasteful number, since it uses less digits than its factorization.

10640245261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 10640245261 its reverse (16254204601), we get a palindrome (26894449862).

The spelling of 10640245261 in words is "ten billion, six hundred forty million, two hundred forty-five thousand, two hundred sixty-one".