12738240946 has 24 divisors (see below), whose sum is σ = 20252757564. Its totient is φ = 6007927680.

The previous prime is 12738240943. The next prime is 12738240953. The reversal of 12738240946 is 64904283721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9556040025 + 3182200921 = 97755^2 + 56411^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12738240896 and 12738240905.

It is not an unprimeable number, because it can be changed into a prime (12738240943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130366 + ... + 206086.

Almost surely, 2^12738240946 is an apocalyptic number.

12738240946 is a deficient number, since it is larger than the sum of its proper divisors (7514516618).

12738240946 is a wasteful number, since it uses less digits than its factorization.

12738240946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75994 (or 75975 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 12738240946 in words is "twelve billion, seven hundred thirty-eight million, two hundred forty thousand, nine hundred forty-six".