13445671302178 has 4 divisors (see below), whose sum is σ = 20168506953270. Its totient is φ = 6722835651088.

The previous prime is 13445671302157. The next prime is 13445671302181. The reversal of 13445671302178 is 87120317654431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8565473382489 + 4880197919689 = 2926683^2 + 2209117^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361417825543 + ... + 3361417825546.

Almost surely, 2^{13445671302178} is an apocalyptic number.

13445671302178 is a deficient number, since it is larger than the sum of its proper divisors (6722835651092).

13445671302178 is an equidigital number, since it uses as much as digits as its factorization.

13445671302178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722835651091.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 13445671302178 in words is "thirteen trillion, four hundred forty-five billion, six hundred seventy-one million, three hundred two thousand, one hundred seventy-eight".