1620815596 has 24 divisors (see below), whose sum is σ = 2987228160. Its totient is φ = 767365200.

The previous prime is 1620815591. The next prime is 1620815621. The reversal of 1620815596 is 6955180261.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1620815591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192801 + ... + 201031.

It is an arithmetic number, because the mean of its divisors is an integer number (124467840).

Almost surely, 2^1620815596 is an apocalyptic number.

It is an amenable number.

1620815596 is a deficient number, since it is larger than the sum of its proper divisors (1366412564).

1620815596 is a wasteful number, since it uses less digits than its factorization.

1620815596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10845 (or 10843 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 1620815596 is about 40259.3541428573. The cubic root of 1620815596 is about 1174.6573549867.

It can be divided in two parts, 1620 and 815596, that added together give a square (817216 = 904²).

The spelling of 1620815596 in words is "one billion, six hundred twenty million, eight hundred fifteen thousand, five hundred ninety-six".