1056111041781 has 12 divisors (see below), whose sum is σ = 1535731941900. Its totient is φ = 699348697920.

The previous prime is 1056111041707. The next prime is 1056111041851. The reversal of 1056111041781 is 1871401116501.

1056111041781 is a `hidden beast` number, since 1 + 0 + 56 + 1 + 110 + 417 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 142861320900 + 913249720881 = 377970^2 + 955641^2 .

It is not a de Polignac number, because 1056111041781 - 2¹³ = 1056111033589 is a prime.

It is a super-2 number, since 2×1056111041781² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056111041701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393776080 + ... + 393778761.

It is an arithmetic number, because the mean of its divisors is an integer number (127977661825).

Almost surely, 2^{1056111041781} is an apocalyptic number.

It is an amenable number.

1056111041781 is a deficient number, since it is larger than the sum of its proper divisors (479620900119).

1056111041781 is a wasteful number, since it uses less digits than its factorization.

1056111041781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787554996 (or 787554993 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 36.

The spelling of 1056111041781 in words is "one trillion, fifty-six billion, one hundred eleven million, forty-one thousand, seven hundred eighty-one".