1166140565442 has 12 divisors (see below), whose sum is σ = 2526637891830. Its totient is φ = 388713521808.

The previous prime is 1166140565437. The next prime is 1166140565519. The reversal of 1166140565442 is 2445650416611.

1166140565442 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 1 + 40 + 565 + 4 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1157971840281 + 8168725161 = 1076091^2 + 90381^2 .

It is a super-3 number, since 3×1166140565442³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32392793467 + ... + 32392793502.

Almost surely, 2^{1166140565442} is an apocalyptic number.

1166140565442 is an abundant number, since it is smaller than the sum of its proper divisors (1360497326388).

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

1166140565442 is a wasteful number, since it uses less digits than its factorization.

1166140565442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64785586977 (or 64785586974 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 1166140565442 in words is "one trillion, one hundred sixty-six billion, one hundred forty million, five hundred sixty-five thousand, four hundred forty-two".