12778945278001 has 16 divisors (see below), whose sum is σ = 15112060444800. Its totient is φ = 10578442267008.

The previous prime is 12778945277897. The next prime is 12778945278023. The reversal of 12778945278001 is 10087254987721.

It is not a de Polignac number, because 12778945278001 - 2¹³ = 12778945269809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12778945278401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238484266 + ... + 238537843.

It is an arithmetic number, because the mean of its divisors is an integer number (944503777800).

Almost surely, 2^{12778945278001} is an apocalyptic number.

It is an amenable number.

12778945278001 is a deficient number, since it is larger than the sum of its proper divisors (2333115166799).

12778945278001 is an equidigital number, since it uses as much as digits as its factorization.

12778945278001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477022248.

The product of its (nonzero) digits is 15805440, while the sum is 61.

The spelling of 12778945278001 in words is "twelve trillion, seven hundred seventy-eight billion, nine hundred forty-five million, two hundred seventy-eight thousand, one".