1593901661 has 12 divisors (see below), whose sum is σ = 1753405500. Its totient is φ = 1447818240.

The previous prime is 1593901627. The next prime is 1593901667. The reversal of 1593901661 is 1661093951.

It can be written as a sum of positive squares in 2 ways, for example, as 590976100 + 1002925561 = 24310^2 + 31669^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1593901661 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1593901667) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 165815 + ... + 175163.

It is an arithmetic number, because the mean of its divisors is an integer number (146117125).

Almost surely, 2^1593901661 is an apocalyptic number.

1593901661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1593901661 is a deficient number, since it is larger than the sum of its proper divisors (159503839).

1593901661 is a wasteful number, since it uses less digits than its factorization.

1593901661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10780 (or 10769 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 1593901661 is about 39923.6979875362. The cubic root of 1593901661 is about 1168.1192324193.

It can be divided in two parts, 159390 and 1661, that added together give a 5-th power (161051 = 11⁵).

The spelling of 1593901661 in words is "one billion, five hundred ninety-three million, nine hundred one thousand, six hundred sixty-one".