125640040663 has 2 divisors, whose sum is σ = 125640040664. Its totient is φ = 125640040662.

The previous prime is 125640040657. The next prime is 125640040723. The reversal of 125640040663 is 366040046521.

It is a weak prime.

It is an emirp because it is prime and its reverse (366040046521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125640040663 - 2¹³ = 125640032471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125640040613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62820020331 + 62820020332.

It is an arithmetic number, because the mean of its divisors is an integer number (62820020332).

Almost surely, 2^125640040663 is an apocalyptic number.

125640040663 is a deficient number, since it is larger than the sum of its proper divisors (1).

125640040663 is an equidigital number, since it uses as much as digits as its factorization.

125640040663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 125640040663 in words is "one hundred twenty-five billion, six hundred forty million, forty thousand, six hundred sixty-three".