2011778553 has 16 divisors (see below), whose sum is σ = 2759178240. Its totient is φ = 1303193616.

The previous prime is 2011778551. The next prime is 2011778563. The reversal of 2011778553 is 3558771102.

It is not a de Polignac number, because 2011778553 - 2¹ = 2011778551 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2011778551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31725 + ... + 70922.

It is an arithmetic number, because the mean of its divisors is an integer number (172448640).

Almost surely, 2^2011778553 is an apocalyptic number.

It is an amenable number.

2011778553 is a deficient number, since it is larger than the sum of its proper divisors (747399687).

2011778553 is a wasteful number, since it uses less digits than its factorization.

2011778553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102836.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 2011778553 is about 44852.8544576597. The cubic root of 2011778553 is about 1262.3895514658.

The spelling of 2011778553 in words is "two billion, eleven million, seven hundred seventy-eight thousand, five hundred fifty-three".