1591793664 has 72 divisors (see below), whose sum is σ = 4252100580. Its totient is φ = 529555456.

The previous prime is 1591793663. The next prime is 1591793669. The reversal of 1591793664 is 4663971951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591793663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3127042 + ... + 3127550.

Almost surely, 2^1591793664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1591793664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2126050290).

1591793664 is an abundant number, since it is smaller than the sum of its proper divisors (2660306916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1591793664 is an frugal number, since it uses more digits than its factorization.

1591793664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043 (or 514 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 51.

The square root of 1591793664 is about 39897.2889304524. The cubic root of 1591793664 is about 1167.6040441798.

The spelling of 1591793664 in words is "one billion, five hundred ninety-one million, seven hundred ninety-three thousand, six hundred sixty-four".