11811381605402 has 8 divisors (see below), whose sum is σ = 17719262699700. Its totient is φ = 5904960705504.

The previous prime is 11811381605393. The next prime is 11811381605461. The reversal of 11811381605402 is 20450618311811.

It can be written as a sum of positive squares in 2 ways, for example, as 11811188701081 + 192904321 = 3436741^2 + 13889^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11811381605402.

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, 365028377 + ... + 365060732.

Almost surely, 2^{11811381605402} is an apocalyptic number.

11811381605402 is a deficient number, since it is larger than the sum of its proper divisors (5907881094298).

11811381605402 is an equidigital number, since it uses as much as digits as its factorization.

11811381605402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730097200.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 11811381605402 in words is "eleven trillion, eight hundred eleven billion, three hundred eighty-one million, six hundred five thousand, four hundred two".