26242640567642 has 16 divisors (see below), whose sum is σ = 40068766661352. Its totient is φ = 12887876666880.

The previous prime is 26242640567621. The next prime is 26242640567719. The reversal of 26242640567642 is 24676504624262.

It can be written as a sum of positive squares in 4 ways, for example, as 24750336450841 + 1492304116801 = 4974971^2 + 1221599^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372877913 + ... + 372948284.

Almost surely, 2^{26242640567642} is an apocalyptic number.

26242640567642 is a deficient number, since it is larger than the sum of its proper divisors (13826126093710).

26242640567642 is a wasteful number, since it uses less digits than its factorization.

26242640567642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745826513.

The product of its (nonzero) digits is 46448640, while the sum is 56.

The spelling of 26242640567642 in words is "twenty-six trillion, two hundred forty-two billion, six hundred forty million, five hundred sixty-seven thousand, six hundred forty-two".