721868162 has 16 divisors (see below), whose sum is σ = 1104207552. Its totient is φ = 353811120.

The previous prime is 721868153. The next prime is 721868177. The reversal of 721868162 is 261868127.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 157913 + ... + 162419.

It is an arithmetic number, because the mean of its divisors is an integer number (69012972).

Almost surely, 2^721868162 is an apocalyptic number.

721868162 is a deficient number, since it is larger than the sum of its proper divisors (382339390).

721868162 is a wasteful number, since it uses less digits than its factorization.

721868162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6073.

The product of its digits is 64512, while the sum is 41.

The square root of 721868162 is about 26867.6043219339. The cubic root of 721868162 is about 897.0554640915.

The spelling of 721868162 in words is "seven hundred twenty-one million, eight hundred sixty-eight thousand, one hundred sixty-two".