11820777005 has 8 divisors (see below), whose sum is σ = 14186477592. Its totient is φ = 9455591488.

The previous prime is 11820776999. The next prime is 11820777011. The reversal of 11820777005 is 50077702811.

It is an interprime number because it is at equal distance from previous prime (11820776999) and next prime (11820777011).

It can be written as a sum of positive squares in 4 ways, for example, as 10738729 + 11810038276 = 3277^2 + 108674^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11820777005 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11820777005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76334 + ... + 171663.

It is an arithmetic number, because the mean of its divisors is an integer number (1773309699).

Almost surely, 2^11820777005 is an apocalyptic number.

It is an amenable number.

11820777005 is a deficient number, since it is larger than the sum of its proper divisors (2365700587).

11820777005 is an equidigital number, since it uses as much as digits as its factorization.

11820777005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257535.

The product of its (nonzero) digits is 27440, while the sum is 38.

The spelling of 11820777005 in words is "eleven billion, eight hundred twenty million, seven hundred seventy-seven thousand, five".