12778772042 has 8 divisors (see below), whose sum is σ = 19251862500. Its totient is φ = 6361484544.

The previous prime is 12778772033. The next prime is 12778772051. The reversal of 12778772042 is 24027787721.

It is an interprime number because it is at equal distance from previous prime (12778772033) and next prime (12778772051).

It can be written as a sum of positive squares in 2 ways, for example, as 12175136281 + 603635761 = 110341^2 + 24569^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13950167 + ... + 13951082.

Almost surely, 2^12778772042 is an apocalyptic number.

12778772042 is a deficient number, since it is larger than the sum of its proper divisors (6473090458).

12778772042 is a wasteful number, since it uses less digits than its factorization.

12778772042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27901480.

The product of its (nonzero) digits is 614656, while the sum is 47.

The spelling of 12778772042 in words is "twelve billion, seven hundred seventy-eight million, seven hundred seventy-two thousand, forty-two".