1011401911789 has 2 divisors, whose sum is σ = 1011401911790. Its totient is φ = 1011401911788.

The previous prime is 1011401911777. The next prime is 1011401911831. The reversal of 1011401911789 is 9871191041101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990257843689 + 21144068100 = 995117^2 + 145410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011401911789 - 2¹¹ = 1011401909741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011401911759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505700955894 + 505700955895.

It is an arithmetic number, because the mean of its divisors is an integer number (505700955895).

Almost surely, 2^{1011401911789} is an apocalyptic number.

It is an amenable number.

1011401911789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011401911789 is an equidigital number, since it uses as much as digits as its factorization.

1011401911789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 43.

The spelling of 1011401911789 in words is "one trillion, eleven billion, four hundred one million, nine hundred eleven thousand, seven hundred eighty-nine".