12578435972 has 12 divisors (see below), whose sum is σ = 22108387980. Its totient is φ = 6261753696.

The previous prime is 12578435971. The next prime is 12578435977. The reversal of 12578435972 is 27953487521.

It can be written as a sum of positive squares in 2 ways, for example, as 10671716416 + 1906719556 = 103304^2 + 43666^2 .

It is not an unprimeable number, because it can be changed into a prime (12578435971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6865043 + ... + 6866874.

It is an arithmetic number, because the mean of its divisors is an integer number (1842365665).

Almost surely, 2^12578435972 is an apocalyptic number.

It is an amenable number.

12578435972 is a deficient number, since it is larger than the sum of its proper divisors (9529952008).

12578435972 is a wasteful number, since it uses less digits than its factorization.

12578435972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13732150 (or 13732148 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 53.

The spelling of 12578435972 in words is "twelve billion, five hundred seventy-eight million, four hundred thirty-five thousand, nine hundred seventy-two".