2645519616 has 324 divisors, whose sum is σ = 8450533728. Its totient is φ = 823882752.

The previous prime is 2645519609. The next prime is 2645519627. The reversal of 2645519616 is 6169155462.

2645519616 is a `hidden beast` number, since 2 + 6 + 4 + 551 + 96 + 1 + 6 = 666.

2645519616 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (324).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 61523691 + ... + 61523733.

Almost surely, 2^2645519616 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 2645519616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4225266864).

2645519616 is an abundant number, since it is smaller than the sum of its proper divisors (5805014112).

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

2645519616 is an frugal number, since it uses more digits than its factorization.

2645519616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 71 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 2645519616 is about 51434.6149591887. The cubic root of 2645519616 is about 1383.0471796102.

The spelling of 2645519616 in words is "two billion, six hundred forty-five million, five hundred nineteen thousand, six hundred sixteen".