725151965 has 4 divisors (see below), whose sum is σ = 870182364. Its totient is φ = 580121568.

The previous prime is 725151923. The next prime is 725151991. The reversal of 725151965 is 569151527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207043321 + 518108644 = 14389^2 + 22762^2 .

It is a cyclic number.

It is not a de Polignac number, because 725151965 - 2⁸ = 725151709 is a prime.

It is a super-2 number, since 2×725151965² = 1051690744686722450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72515192 + ... + 72515201.

It is an arithmetic number, because the mean of its divisors is an integer number (217545591).

Almost surely, 2^725151965 is an apocalyptic number.

It is an amenable number.

725151965 is a deficient number, since it is larger than the sum of its proper divisors (145030399).

725151965 is a wasteful number, since it uses less digits than its factorization.

725151965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145030398.

The product of its digits is 94500, while the sum is 41.

The square root of 725151965 is about 26928.6458070212. The cubic root of 725151965 is about 898.4136520339.

The spelling of 725151965 in words is "seven hundred twenty-five million, one hundred fifty-one thousand, nine hundred sixty-five".