2011565490 has 64 divisors (see below), whose sum is σ = 5318877312. Its totient is φ = 482816000.

The previous prime is 2011565489. The next prime is 2011565509. The reversal of 2011565490 is 945651102.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3154 + ... + 63506.

It is an arithmetic number, because the mean of its divisors is an integer number (83107458).

Almost surely, 2^2011565490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011565490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2659438656).

2011565490 is an abundant number, since it is smaller than the sum of its proper divisors (3307311822).

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

2011565490 is a wasteful number, since it uses less digits than its factorization.

2011565490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60475.

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

The square root of 2011565490 is about 44850.4792616534. The cubic root of 2011565490 is about 1262.3449842675.

The spelling of 2011565490 in words is "two billion, eleven million, five hundred sixty-five thousand, four hundred ninety".