2011565616 has 40 divisors (see below), whose sum is σ = 5323294704. Its totient is φ = 654167040.

The previous prime is 2011565581. The next prime is 2011565639. The reversal of 2011565616 is 6165651102.

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, 509101 + ... + 513036.

Almost surely, 2^2011565616 is an apocalyptic number.

It is an amenable number.

2011565616 is an abundant number, since it is smaller than the sum of its proper divisors (3311729088).

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

2011565616 is a wasteful number, since it uses less digits than its factorization.

2011565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022189 (or 1022183 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 2011565616 is about 44850.4806663206. The cubic root of 2011565616 is about 1262.3450106244.

The spelling of 2011565616 in words is "two billion, eleven million, five hundred sixty-five thousand, six hundred sixteen".