1166813786445 has 64 divisors (see below), whose sum is σ = 2013518787840. Its totient is φ = 574823927808.

The previous prime is 1166813786429. The next prime is 1166813786449. The reversal of 1166813786445 is 5446873186611.

It is not a de Polignac number, because 1166813786445 - 2⁴ = 1166813786429 is a prime.

It is a super-3 number, since 3×1166813786445³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166813786449) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9159327 + ... + 9285843.

It is an arithmetic number, because the mean of its divisors is an integer number (31461231060).

Almost surely, 2^{1166813786445} is an apocalyptic number.

1166813786445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166813786445 is a deficient number, since it is larger than the sum of its proper divisors (846705001395).

1166813786445 is a wasteful number, since it uses less digits than its factorization.

1166813786445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127214.

The product of its digits is 23224320, while the sum is 60.

The spelling of 1166813786445 in words is "one trillion, one hundred sixty-six billion, eight hundred thirteen million, seven hundred eighty-six thousand, four hundred forty-five".