12540624653 has 2 divisors, whose sum is σ = 12540624654. Its totient is φ = 12540624652.

The previous prime is 12540624641. The next prime is 12540624659. The reversal of 12540624653 is 35642604521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8863657609 + 3676967044 = 94147^2 + 60638^2 .

It is an emirp because it is prime and its reverse (35642604521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12540624653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12540624659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270312326 + 6270312327.

It is an arithmetic number, because the mean of its divisors is an integer number (6270312327).

Almost surely, 2^12540624653 is an apocalyptic number.

It is an amenable number.

12540624653 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540624653 is an equidigital number, since it uses as much as digits as its factorization.

12540624653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 12540624653 in words is "twelve billion, five hundred forty million, six hundred twenty-four thousand, six hundred fifty-three".