26440202638 has 8 divisors (see below), whose sum is σ = 39912917832. Its totient is φ = 13135896696.

The previous prime is 26440202599. The next prime is 26440202651. The reversal of 26440202638 is 83620204462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 26440202597 and 26440202606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42101920 + ... + 42102547.

It is an arithmetic number, because the mean of its divisors is an integer number (4989114729).

Almost surely, 2^26440202638 is an apocalyptic number.

26440202638 is a deficient number, since it is larger than the sum of its proper divisors (13472715194).

26440202638 is a wasteful number, since it uses less digits than its factorization.

26440202638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84204626.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 26440202638 in words is "twenty-six billion, four hundred forty million, two hundred two thousand, six hundred thirty-eight".