2658690816 has 72 divisors (see below), whose sum is σ = 7096440960. Its totient is φ = 883670016.

The previous prime is 2658690799. The next prime is 2658690823. The reversal of 2658690816 is 6180968562.

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, 270891 + ... + 280533.

It is an arithmetic number, because the mean of its divisors is an integer number (98561680).

Almost surely, 2^2658690816 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 2658690816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3548220480).

2658690816 is an abundant number, since it is smaller than the sum of its proper divisors (4437750144).

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

2658690816 is an equidigital number, since it uses as much as digits as its factorization.

2658690816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021 (or 10007 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 2658690816 is about 51562.4942763633. The cubic root of 2658690816 is about 1385.3386315477.

The spelling of 2658690816 in words is "two billion, six hundred fifty-eight million, six hundred ninety thousand, eight hundred sixteen".