12540570372009 has 24 divisors (see below), whose sum is σ = 18810157270632. Its totient is φ = 8044736071680.

The previous prime is 12540570371969. The next prime is 12540570372017. The reversal of 12540570372009 is 90027307504521.

It is a happy number.

12540570372009 is a `hidden beast` number, since 1 + 2 + 5 + 4 + 0 + 570 + 3 + 72 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 472932009 + 12540097440000 = 21747^2 + 3541200^2 .

It is not a de Polignac number, because 12540570372009 - 2²⁹ = 12540033501097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12540570372019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232748992 + ... + 232802865.

It is an arithmetic number, because the mean of its divisors is an integer number (783756552943).

Almost surely, 2^{12540570372009} is an apocalyptic number.

It is an amenable number.

12540570372009 is a deficient number, since it is larger than the sum of its proper divisors (6269586898623).

12540570372009 is a wasteful number, since it uses less digits than its factorization.

12540570372009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465551977 (or 465551974 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 12540570372009 in words is "twelve trillion, five hundred forty billion, five hundred seventy million, three hundred seventy-two thousand, nine".