10269809681 has 4 divisors (see below), whose sum is σ = 10810326000. Its totient is φ = 9729293364.

The previous prime is 10269809677. The next prime is 10269809707. The reversal of 10269809681 is 18690896201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18690896201 = 19 ⋅983731379.

It is a cyclic number.

It is not a de Polignac number, because 10269809681 - 2² = 10269809677 is a prime.

It is a super-2 number, since 2×10269809681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10269806681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270258131 + ... + 270258168.

It is an arithmetic number, because the mean of its divisors is an integer number (2702581500).

Almost surely, 2^10269809681 is an apocalyptic number.

It is an amenable number.

10269809681 is a deficient number, since it is larger than the sum of its proper divisors (540516319).

10269809681 is an equidigital number, since it uses as much as digits as its factorization.

10269809681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540516318.

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 10269809681 in words is "ten billion, two hundred sixty-nine million, eight hundred nine thousand, six hundred eighty-one".