725565513679 has 2 divisors, whose sum is σ = 725565513680. Its totient is φ = 725565513678.

The previous prime is 725565513643. The next prime is 725565513719. The reversal of 725565513679 is 976315565527.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 725565513679 - 2⁷ = 725565513551 is a prime.

It is a super-2 number, since 2×725565513679² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725565514679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362782756839 + 362782756840.

It is an arithmetic number, because the mean of its divisors is an integer number (362782756840).

Almost surely, 2^725565513679 is an apocalyptic number.

725565513679 is a deficient number, since it is larger than the sum of its proper divisors (1).

725565513679 is an equidigital number, since it uses as much as digits as its factorization.

725565513679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59535000, while the sum is 61.

The spelling of 725565513679 in words is "seven hundred twenty-five billion, five hundred sixty-five million, five hundred thirteen thousand, six hundred seventy-nine".