26402642644242 has 64 divisors (see below), whose sum is σ = 54254339612928. Its totient is φ = 8560688640000.

The previous prime is 26402642644177. The next prime is 26402642644243. The reversal of 26402642644242 is 24244624620462.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 26402642644191 and 26402642644200.

It is not an unprimeable number, because it can be changed into a prime (26402642644243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111454242 + ... + 111690882.

It is an arithmetic number, because the mean of its divisors is an integer number (847724056452).

Almost surely, 2^{26402642644242} is an apocalyptic number.

26402642644242 is an abundant number, since it is smaller than the sum of its proper divisors (27851696968686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26402642644242 is a wasteful number, since it uses less digits than its factorization.

26402642644242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238035.

The product of its (nonzero) digits is 7077888, while the sum is 48.

The spelling of 26402642644242 in words is "twenty-six trillion, four hundred two billion, six hundred forty-two million, six hundred forty-four thousand, two hundred forty-two".