2011289777 has 4 divisors (see below), whose sum is σ = 2298616896. Its totient is φ = 1723962660.

The previous prime is 2011289723. The next prime is 2011289779. The reversal of 2011289777 is 7779821102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7779821102 = 2 ⋅3889910551.

It is not a de Polignac number, because 2011289777 - 2⁶ = 2011289713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011289779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143663549 + ... + 143663562.

It is an arithmetic number, because the mean of its divisors is an integer number (574654224).

Almost surely, 2^2011289777 is an apocalyptic number.

It is an amenable number.

2011289777 is a deficient number, since it is larger than the sum of its proper divisors (287327119).

2011289777 is an equidigital number, since it uses as much as digits as its factorization.

2011289777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287327118.

The product of its (nonzero) digits is 98784, while the sum is 44.

The square root of 2011289777 is about 44847.4054656454. The cubic root of 2011289777 is about 1262.2873076591.

The spelling of 2011289777 in words is "two billion, eleven million, two hundred eighty-nine thousand, seven hundred seventy-seven".