11778693206173 has 4 divisors (see below), whose sum is σ = 11779450645248. Its totient is φ = 11777935767100.

The previous prime is 11778693206143. The next prime is 11778693206243. The reversal of 11778693206173 is 37160239687711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11778693206173 - 2⁹ = 11778693205661 is a prime.

It is a super-2 number, since 2×11778693206173² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778693206143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378696211 + ... + 378727312.

It is an arithmetic number, because the mean of its divisors is an integer number (2944862661312).

Almost surely, 2^{11778693206173} is an apocalyptic number.

It is an amenable number.

11778693206173 is a deficient number, since it is larger than the sum of its proper divisors (757439075).

11778693206173 is an equidigital number, since it uses as much as digits as its factorization.

11778693206173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757439074.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 11778693206173 in words is "eleven trillion, seven hundred seventy-eight billion, six hundred ninety-three million, two hundred six thousand, one hundred seventy-three".