725686162 has 4 divisors (see below), whose sum is σ = 1088529246. Its totient is φ = 362843080.

The previous prime is 725686109. The next prime is 725686163. The reversal of 725686162 is 261686527.

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

It can be written as a sum of positive squares in only one way, i.e., 496799521 + 228886641 = 22289^2 + 15129^2 .

It is not an unprimeable number, because it can be changed into a prime (725686163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181421539 + ... + 181421542.

Almost surely, 2^725686162 is an apocalyptic number.

725686162 is a deficient number, since it is larger than the sum of its proper divisors (362843084).

725686162 is a wasteful number, since it uses less digits than its factorization.

725686162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362843083.

The product of its digits is 241920, while the sum is 43.

The square root of 725686162 is about 26938.5627307769. The cubic root of 725686162 is about 898.6342090570.

The spelling of 725686162 in words is "seven hundred twenty-five million, six hundred eighty-six thousand, one hundred sixty-two".