1111611061566 has 32 divisors (see below), whose sum is σ = 2482660128000. Its totient is φ = 368675021880.

The previous prime is 1111611061559. The next prime is 1111611061567. The reversal of 1111611061566 is 6651601161111.

It is a happy number.

1111611061566 is a `hidden beast` number, since 1 + 11 + 16 + 1 + 10 + 61 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1111611061566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111611061567) 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, 51711340 + ... + 51732831.

It is an arithmetic number, because the mean of its divisors is an integer number (77583129000).

Almost surely, 2^{1111611061566} is an apocalyptic number.

1111611061566 is an abundant number, since it is smaller than the sum of its proper divisors (1371049066434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111611061566 is a wasteful number, since it uses less digits than its factorization.

1111611061566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103444381 (or 103444375 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The spelling of 1111611061566 in words is "one trillion, one hundred eleven billion, six hundred eleven million, sixty-one thousand, five hundred sixty-six".