725565513643 has 2 divisors, whose sum is σ = 725565513644. Its totient is φ = 725565513642.

The previous prime is 725565513587. The next prime is 725565513679. The reversal of 725565513643 is 346315565527.

It is a strong prime.

It is an emirp because it is prime and its reverse (346315565527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725565513643 - 2²¹ = 725563416491 is a prime.

It is not a weakly prime, because it can be changed into another prime (725565517643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362782756821 + 362782756822.

It is an arithmetic number, because the mean of its divisors is an integer number (362782756822).

Almost surely, 2^725565513643 is an apocalyptic number.

725565513643 is a deficient number, since it is larger than the sum of its proper divisors (1).

725565513643 is an equidigital number, since it uses as much as digits as its factorization.

725565513643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340000, while the sum is 52.

The spelling of 725565513643 in words is "seven hundred twenty-five billion, five hundred sixty-five million, five hundred thirteen thousand, six hundred forty-three".