813596641 has 16 divisors (see below), whose sum is σ = 997395840. Its totient is φ = 653051520.

The previous prime is 813596633. The next prime is 813596657. The reversal of 813596641 is 146695318.

It is not a de Polignac number, because 813596641 - 2³ = 813596633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813596681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120396 + ... + 126973.

It is an arithmetic number, because the mean of its divisors is an integer number (62337240).

Almost surely, 2^813596641 is an apocalyptic number.

It is an amenable number.

813596641 is a deficient number, since it is larger than the sum of its proper divisors (183799199).

813596641 is a wasteful number, since it uses less digits than its factorization.

813596641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247416.

The product of its digits is 155520, while the sum is 43.

The square root of 813596641 is about 28523.6154966372. The cubic root of 813596641 is about 933.5474183929.

The spelling of 813596641 in words is "eight hundred thirteen million, five hundred ninety-six thousand, six hundred forty-one".