10265406643 has 4 divisors (see below), whose sum is σ = 10265685808. Its totient is φ = 10265127480.

The previous prime is 10265406623. The next prime is 10265406649. The reversal of 10265406643 is 34660456201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10265406643 is a prime.

It is a super-2 number, since 2×10265406643² (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 (10265406649) 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, 74223 + ... + 161368.

It is an arithmetic number, because the mean of its divisors is an integer number (2566421452).

Almost surely, 2^10265406643 is an apocalyptic number.

10265406643 is a deficient number, since it is larger than the sum of its proper divisors (279165).

10265406643 is an equidigital number, since it uses as much as digits as its factorization.

10265406643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279164.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 10265406643 in words is "ten billion, two hundred sixty-five million, four hundred six thousand, six hundred forty-three".