12782078185 has 16 divisors (see below), whose sum is σ = 15435185040. Its totient is φ = 10161264640.

The previous prime is 12782078173. The next prime is 12782078191. The reversal of 12782078185 is 58187028721.

It can be written as a sum of positive squares in 8 ways, for example, as 42667024 + 12739411161 = 6532^2 + 112869^2 .

It is not a de Polignac number, because 12782078185 - 2²¹ = 12779981033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3251301 + ... + 3255229.

It is an arithmetic number, because the mean of its divisors is an integer number (964699065).

Almost surely, 2^12782078185 is an apocalyptic number.

It is an amenable number.

12782078185 is a deficient number, since it is larger than the sum of its proper divisors (2653106855).

12782078185 is a wasteful number, since it uses less digits than its factorization.

12782078185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7868.

The product of its (nonzero) digits is 501760, while the sum is 49.

The spelling of 12782078185 in words is "twelve billion, seven hundred eighty-two million, seventy-eight thousand, one hundred eighty-five".