813201644 has 12 divisors (see below), whose sum is σ = 1472175600. Its totient is φ = 392580048.

The previous prime is 813201629. The next prime is 813201659. The reversal of 813201644 is 446102318.

813201644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (813201629) and next prime (813201659).

It is a super-3 number, since 3×813201644³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3505064 + ... + 3505295.

It is an arithmetic number, because the mean of its divisors is an integer number (122681300).

Almost surely, 2^813201644 is an apocalyptic number.

It is an amenable number.

813201644 is a deficient number, since it is larger than the sum of its proper divisors (658973956).

813201644 is a wasteful number, since it uses less digits than its factorization.

813201644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010392 (or 7010390 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 813201644 is about 28516.6906214589. The cubic root of 813201644 is about 933.3963164413.

The spelling of 813201644 in words is "eight hundred thirteen million, two hundred one thousand, six hundred forty-four".