1011549035897 has 2 divisors, whose sum is σ = 1011549035898. Its totient is φ = 1011549035896.

The previous prime is 1011549035881. The next prime is 1011549035927. The reversal of 1011549035897 is 7985309451101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815172431161 + 196376604736 = 902869^2 + 443144^2 .

It is an emirp because it is prime and its reverse (7985309451101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011549035897 - 2⁴ = 1011549035881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011549035807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505774517948 + 505774517949.

It is an arithmetic number, because the mean of its divisors is an integer number (505774517949).

Almost surely, 2^{1011549035897} is an apocalyptic number.

It is an amenable number.

1011549035897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011549035897 is an equidigital number, since it uses as much as digits as its factorization.

1011549035897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 1011549035897 in words is "one trillion, eleven billion, five hundred forty-nine million, thirty-five thousand, eight hundred ninety-seven".