503981545901 has 2 divisors, whose sum is σ = 503981545902. Its totient is φ = 503981545900.

The previous prime is 503981545897. The next prime is 503981545909. The reversal of 503981545901 is 109545189305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486471375625 + 17510170276 = 697475^2 + 132326^2 .

It is a cyclic number.

It is not a de Polignac number, because 503981545901 - 2² = 503981545897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 503981545901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503981545909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251990772950 + 251990772951.

It is an arithmetic number, because the mean of its divisors is an integer number (251990772951).

Almost surely, 2^503981545901 is an apocalyptic number.

It is an amenable number.

503981545901 is a deficient number, since it is larger than the sum of its proper divisors (1).

503981545901 is an equidigital number, since it uses as much as digits as its factorization.

503981545901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 503981545901 in words is "five hundred three billion, nine hundred eighty-one million, five hundred forty-five thousand, nine hundred one".