725157969169 has 2 divisors, whose sum is σ = 725157969170. Its totient is φ = 725157969168.

The previous prime is 725157969139. The next prime is 725157969197. The reversal of 725157969169 is 961969751527.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 717586881025 + 7571088144 = 847105^2 + 87012^2 .

It is a cyclic number.

It is not a de Polignac number, because 725157969169 - 2⁹ = 725157968657 is a prime.

It is a super-2 number, since 2×725157969169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725157969139) 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, 362578984584 + 362578984585.

It is an arithmetic number, because the mean of its divisors is an integer number (362578984585).

Almost surely, 2^725157969169 is an apocalyptic number.

It is an amenable number.

725157969169 is a deficient number, since it is larger than the sum of its proper divisors (1).

725157969169 is an equidigital number, since it uses as much as digits as its factorization.

725157969169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64297800, while the sum is 67.

The spelling of 725157969169 in words is "seven hundred twenty-five billion, one hundred fifty-seven million, nine hundred sixty-nine thousand, one hundred sixty-nine".