10643965438723 has 4 divisors (see below), whose sum is σ = 10749351235248. Its totient is φ = 10538579642200.

The previous prime is 10643965438657. The next prime is 10643965438751. The reversal of 10643965438723 is 32783456934601.

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

It is a cyclic number.

It is not a de Polignac number, because 10643965438723 - 2²⁵ = 10643931884291 is a prime.

It is a super-2 number, since 2×10643965438723² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10643965436723) 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, 52692898111 + ... + 52692898312.

It is an arithmetic number, because the mean of its divisors is an integer number (2687337808812).

It is a 1-persistent number, because it is pandigital, but 2⋅10643965438723 = 21287930877446 is not.

Almost surely, 2^{10643965438723} is an apocalyptic number.

10643965438723 is a deficient number, since it is larger than the sum of its proper divisors (105385796525).

10643965438723 is a wasteful number, since it uses less digits than its factorization.

10643965438723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105385796524.

The product of its (nonzero) digits is 78382080, while the sum is 61.

The spelling of 10643965438723 in words is "ten trillion, six hundred forty-three billion, nine hundred sixty-five million, four hundred thirty-eight thousand, seven hundred twenty-three".