26563216642 has 32 divisors (see below), whose sum is σ = 40602240000. Its totient is φ = 13032306000.

The previous prime is 26563216639. The next prime is 26563216661. The reversal of 26563216642 is 24661236562.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8855859 + ... + 8858857.

It is an arithmetic number, because the mean of its divisors is an integer number (1268820000).

Almost surely, 2^26563216642 is an apocalyptic number.

26563216642 is a deficient number, since it is larger than the sum of its proper divisors (14039023358).

26563216642 is a wasteful number, since it uses less digits than its factorization.

26563216642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502.

The product of its digits is 622080, while the sum is 43.

The spelling of 26563216642 in words is "twenty-six billion, five hundred sixty-three million, two hundred sixteen thousand, six hundred forty-two".