12780426039386 has 4 divisors (see below), whose sum is σ = 19170639059082. Its totient is φ = 6390213019692.

The previous prime is 12780426039373. The next prime is 12780426039431. The reversal of 12780426039386 is 68393062408721.

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., 8743440938761 + 4036985100625 = 2956931^2 + 2009225^2 .

It is a super-3 number, since 3×12780426039386³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195106509845 + ... + 3195106509848.

Almost surely, 2^{12780426039386} is an apocalyptic number.

12780426039386 is a deficient number, since it is larger than the sum of its proper divisors (6390213019696).

12780426039386 is an equidigital number, since it uses as much as digits as its factorization.

12780426039386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390213019695.

The product of its (nonzero) digits is 20901888, while the sum is 59.

The spelling of 12780426039386 in words is "twelve trillion, seven hundred eighty billion, four hundred twenty-six million, thirty-nine thousand, three hundred eighty-six".