2118506077 has 4 divisors (see below), whose sum is σ = 2175763036. Its totient is φ = 2061249120.

The previous prime is 2118506053. The next prime is 2118506081. The reversal of 2118506077 is 7706058112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1802342116 + 316163961 = 42454^2 + 17781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118506077 - 2¹¹ = 2118504029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 57256921 = 2118506077 / (2 + 1 + 1 + 8 + 5 + 0 + 6 + 0 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118504077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28628424 + ... + 28628497.

It is an arithmetic number, because the mean of its divisors is an integer number (543940759).

Almost surely, 2^2118506077 is an apocalyptic number.

It is an amenable number.

2118506077 is a deficient number, since it is larger than the sum of its proper divisors (57256959).

2118506077 is an equidigital number, since it uses as much as digits as its factorization.

2118506077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57256958.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 2118506077 is about 46027.2319067745. The cubic root of 2118506077 is about 1284.3298351102.

The spelling of 2118506077 in words is "two billion, one hundred eighteen million, five hundred six thousand, seventy-seven".