1011661100056 has 16 divisors (see below), whose sum is σ = 1896973720200. Its totient is φ = 505801441344.

The previous prime is 1011661100053. The next prime is 1011661100059. The reversal of 1011661100056 is 6500011661101.

1011661100056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1011661100053) and next prime (1011661100059).

It is a junction number, because it is equal to n+sod(n) for n = 1011661099997 and 1011661100033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011661100053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3490525 + ... + 3769228.

Almost surely, 2^{1011661100056} is an apocalyptic number.

It is an amenable number.

1011661100056 is a deficient number, since it is larger than the sum of its proper divisors (885312620144).

1011661100056 is a wasteful number, since it uses less digits than its factorization.

1011661100056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7277178 (or 7277174 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 28.

Adding to 1011661100056 its reverse (6500011661101), we get a palindrome (7511672761157).

The spelling of 1011661100056 in words is "one trillion, eleven billion, six hundred sixty-one million, one hundred thousand, fifty-six".