1918061775 has 120 divisors (see below), whose sum is σ = 4148305920. Its totient is φ = 857874240.

The previous prime is 1918061753. The next prime is 1918061779. The reversal of 1918061775 is 5771608191.

1918061775 is a `hidden beast` number, since 19 + 18 + 0 + 617 + 7 + 5 = 666.

It is not a de Polignac number, because 1918061775 - 2¹² = 1918057679 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 1918061775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918061779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 664786 + ... + 667664.

It is an arithmetic number, because the mean of its divisors is an integer number (34569216).

Almost surely, 2^1918061775 is an apocalyptic number.

1918061775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1918061775 is an abundant number, since it is smaller than the sum of its proper divisors (2230244145).

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

1918061775 is a wasteful number, since it uses less digits than its factorization.

1918061775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955 (or 2941 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 45.

The square root of 1918061775 is about 43795.6821501846. The cubic root of 1918061775 is about 1242.4746313106.

The spelling of 1918061775 in words is "one billion, nine hundred eighteen million, sixty-one thousand, seven hundred seventy-five".