12540397803 has 32 divisors (see below), whose sum is σ = 18733731840. Its totient is φ = 7415216640.

The previous prime is 12540397763. The next prime is 12540397811. The reversal of 12540397803 is 30879304521.

It is not a de Polignac number, because 12540397803 - 2⁶ = 12540397739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12540397813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151201 + ... + 218957.

It is an arithmetic number, because the mean of its divisors is an integer number (585429120).

Almost surely, 2^12540397803 is an apocalyptic number.

12540397803 is a deficient number, since it is larger than the sum of its proper divisors (6193334037).

12540397803 is a wasteful number, since it uses less digits than its factorization.

12540397803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67987.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 12540397803 in words is "twelve billion, five hundred forty million, three hundred ninety-seven thousand, eight hundred three".