1778000011 has 2 divisors, whose sum is σ = 1778000012. Its totient is φ = 1778000010.

The previous prime is 1777999999. The next prime is 1778000051. The reversal of 1778000011 is 1100008771.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1778000011 is a prime.

It is a super-2 number, since 2×1778000011² = 6322568078232000242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1778000011.

It is not a weakly prime, because it can be changed into another prime (1778000051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 889000005 + 889000006.

It is an arithmetic number, because the mean of its divisors is an integer number (889000006).

Almost surely, 2^1778000011 is an apocalyptic number.

1778000011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1778000011 is an equidigital number, since it uses as much as digits as its factorization.

1778000011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 25.

The square root of 1778000011 is about 42166.3374150518. The cubic root of 1778000011 is about 1211.4642045221.

Adding to 1778000011 its reverse (1100008771), we get a palindrome (2878008782).

The spelling of 1778000011 in words is "one billion, seven hundred seventy-eight million, eleven", and thus it is an aban number.