1011191660681 has 16 divisors (see below), whose sum is σ = 1084316256000. Its totient is φ = 939584924928.

The previous prime is 1011191660663. The next prime is 1011191660707. The reversal of 1011191660681 is 1860661911101.

1011191660681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011191660681 is a prime.

It is a super-2 number, since 2×1011191660681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011191660651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21912170 + ... + 21958268.

It is an arithmetic number, because the mean of its divisors is an integer number (67769766000).

Almost surely, 2^{1011191660681} is an apocalyptic number.

It is an amenable number.

1011191660681 is a deficient number, since it is larger than the sum of its proper divisors (73124595319).

1011191660681 is a wasteful number, since it uses less digits than its factorization.

1011191660681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62528.

The product of its (nonzero) digits is 15552, while the sum is 41.

The spelling of 1011191660681 in words is "one trillion, eleven billion, one hundred ninety-one million, six hundred sixty thousand, six hundred eighty-one".