2039993664 has 56 divisors (see below), whose sum is σ = 5420002368. Its totient is φ = 677160960.

The previous prime is 2039993639. The next prime is 2039993699. The reversal of 2039993664 is 4663999302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24229 + ... + 68315.

Almost surely, 2^2039993664 is an apocalyptic number.

2039993664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2039993664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2710001184).

2039993664 is an abundant number, since it is smaller than the sum of its proper divisors (3380008704).

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

2039993664 is a wasteful number, since it uses less digits than its factorization.

2039993664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44343 (or 44333 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 51.

The square root of 2039993664 is about 45166.2890217915. The cubic root of 2039993664 is about 1268.2638280482.

The spelling of 2039993664 in words is "two billion, thirty-nine million, nine hundred ninety-three thousand, six hundred sixty-four".