1061156666113 has 4 divisors (see below), whose sum is σ = 1061161436608. Its totient is φ = 1061151895620.

The previous prime is 1061156666111. The next prime is 1061156666147. The reversal of 1061156666113 is 3116666511601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1061156666113 - 2¹ = 1061156666111 is a prime.

It is a super-2 number, since 2×1061156666113² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061156666113.

It is not an unprimeable number, because it can be changed into a prime (1061156666111) 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, 2034381 + ... + 2502202.

It is an arithmetic number, because the mean of its divisors is an integer number (265290359152).

Almost surely, 2^{1061156666113} is an apocalyptic number.

It is an amenable number.

1061156666113 is a deficient number, since it is larger than the sum of its proper divisors (4770495).

1061156666113 is an equidigital number, since it uses as much as digits as its factorization.

1061156666113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770494.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 1061156666113 in words is "one trillion, sixty-one billion, one hundred fifty-six million, six hundred sixty-six thousand, one hundred thirteen".