26006642602643 has 4 divisors (see below), whose sum is σ = 27375413265960. Its totient is φ = 24637871939328.

The previous prime is 26006642602639. The next prime is 26006642602723. The reversal of 26006642602643 is 34620624660062.

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 26006642602643 - 2² = 26006642602639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26006642602243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684385331630 + ... + 684385331667.

It is an arithmetic number, because the mean of its divisors is an integer number (6843853316490).

Almost surely, 2^{26006642602643} is an apocalyptic number.

26006642602643 is a deficient number, since it is larger than the sum of its proper divisors (1368770663317).

26006642602643 is a wasteful number, since it uses less digits than its factorization.

26006642602643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368770663316.

The product of its (nonzero) digits is 2985984, while the sum is 47.

The spelling of 26006642602643 in words is "twenty-six trillion, six billion, six hundred forty-two million, six hundred two thousand, six hundred forty-three".