12971104578 has 48 divisors (see below), whose sum is σ = 29149558776. Its totient is φ = 4165171200.

The previous prime is 12971104571. The next prime is 12971104579. The reversal of 12971104578 is 87540117921.

It is a happy number.

12971104578 is a `hidden beast` number, since 1 + 2 + 9 + 71 + 1 + 0 + 4 + 578 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12134564649 + 836539929 = 110157^2 + 28923^2 .

It is not an unprimeable number, because it can be changed into a prime (12971104571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29151 + ... + 163682.

Almost surely, 2^12971104578 is an apocalyptic number.

12971104578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12971104578 is an abundant number, since it is smaller than the sum of its proper divisors (16178454198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12971104578 is a wasteful number, since it uses less digits than its factorization.

12971104578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192979 (or 192976 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 12971104578 in words is "twelve billion, nine hundred seventy-one million, one hundred four thousand, five hundred seventy-eight".