722301645 has 16 divisors (see below), whose sum is σ = 1244581632. Its totient is φ = 355594560.

The previous prime is 722301641. The next prime is 722301703. The reversal of 722301645 is 546103227.

It is not a de Polignac number, because 722301645 - 2² = 722301641 is a prime.

It is a super-3 number, since 3×722301645³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722301641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851861 + ... + 1852250.

It is an arithmetic number, because the mean of its divisors is an integer number (77786352).

Almost surely, 2^722301645 is an apocalyptic number.

It is an amenable number.

722301645 is a deficient number, since it is larger than the sum of its proper divisors (522279987).

722301645 is a wasteful number, since it uses less digits than its factorization.

722301645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704132.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 722301645 is about 26875.6701311800. The cubic root of 722301645 is about 897.2349892474.

The spelling of 722301645 in words is "seven hundred twenty-two million, three hundred one thousand, six hundred forty-five".