2005996545 has 72 divisors (see below), whose sum is σ = 4143583080. Its totient is φ = 894620160.

The previous prime is 2005996513. The next prime is 2005996571. The reversal of 2005996545 is 5456995002.

It is a happy number.

2005996545 is a `hidden beast` number, since 2 + 0 + 0 + 599 + 6 + 54 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31438449 + 1974558096 = 5607^2 + 44436^2 .

It is not a de Polignac number, because 2005996545 - 2⁵ = 2005996513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2005996545.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 79311 + ... + 101499.

It is an arithmetic number, because the mean of its divisors is an integer number (57549765).

Almost surely, 2^2005996545 is an apocalyptic number.

It is an amenable number.

2005996545 is an abundant number, since it is smaller than the sum of its proper divisors (2137586535).

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

2005996545 is a wasteful number, since it uses less digits than its factorization.

2005996545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22255 (or 22245 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The square root of 2005996545 is about 44788.3527828385. The cubic root of 2005996545 is about 1261.1789890618.

The spelling of 2005996545 in words is "two billion, five million, nine hundred ninety-six thousand, five hundred forty-five".