2169779755 has 16 divisors (see below), whose sum is σ = 3058935264. Its totient is φ = 1456634880.

The previous prime is 2169779753. The next prime is 2169779767. The reversal of 2169779755 is 5579779612.

It is not a de Polignac number, because 2169779755 - 2¹ = 2169779753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2169779755.

It is not an unprimeable number, because it can be changed into a prime (2169779753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1516614 + ... + 1518043.

It is an arithmetic number, because the mean of its divisors is an integer number (191183454).

Almost surely, 2^2169779755 is an apocalyptic number.

2169779755 is a deficient number, since it is larger than the sum of its proper divisors (889155509).

2169779755 is a wasteful number, since it uses less digits than its factorization.

2169779755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034686.

The product of its digits is 8334900, while the sum is 58.

The square root of 2169779755 is about 46580.8947423727. The cubic root of 2169779755 is about 1294.6087884745.

The spelling of 2169779755 in words is "two billion, one hundred sixty-nine million, seven hundred seventy-nine thousand, seven hundred fifty-five".