1171206423745 has 16 divisors (see below), whose sum is σ = 1530433080000. Its totient is φ = 857042520768.

The previous prime is 1171206423731. The next prime is 1171206423757. The reversal of 1171206423745 is 5473246021711.

It is a cyclic number.

It is not a de Polignac number, because 1171206423745 - 2⁷ = 1171206423617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212557395 + ... + 212562904.

It is an arithmetic number, because the mean of its divisors is an integer number (95652067500).

Almost surely, 2^{1171206423745} is an apocalyptic number.

It is an amenable number.

1171206423745 is a deficient number, since it is larger than the sum of its proper divisors (359226656255).

1171206423745 is a wasteful number, since it uses less digits than its factorization.

1171206423745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425120352.

The product of its (nonzero) digits is 282240, while the sum is 43.

It can be divided in two parts, 1171206 and 423745, that added together give a palindrome (1594951).

The spelling of 1171206423745 in words is "one trillion, one hundred seventy-one billion, two hundred six million, four hundred twenty-three thousand, seven hundred forty-five".