12757475378 has 6 divisors (see below), whose sum is σ = 19136452671. Its totient is φ = 6378657822.

The previous prime is 12757475363. The next prime is 12757475383. The reversal of 12757475378 is 87357475721.

It can be written as a sum of positive squares in only one way, i.e., 6378737689 + 6378737689 = 79867^2 + 79867^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=79867.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 119801 + ... + 199667.

Almost surely, 2^12757475378 is an apocalyptic number.

12757475378 is a deficient number, since it is larger than the sum of its proper divisors (6378977293).

12757475378 is an frugal number, since it uses more digits than its factorization.

12757475378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159736 (or 79869 counting only the distinct ones).

The product of its digits is 11524800, while the sum is 56.

The spelling of 12757475378 in words is "twelve billion, seven hundred fifty-seven million, four hundred seventy-five thousand, three hundred seventy-eight".