1156566566064 has 80 divisors (see below), whose sum is σ = 3677288582912. Its totient is φ = 305028543744.

The previous prime is 1156566566059. The next prime is 1156566566087. The reversal of 1156566566064 is 4606656656511.

It is a junction number, because it is equal to n+sod(n) for n = 1156566565995 and 1156566566013.

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, 132386494 + ... + 132395229.

Almost surely, 2^{1156566566064} is an apocalyptic number.

1156566566064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1156566566064 is an abundant number, since it is smaller than the sum of its proper divisors (2520722016848).

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

1156566566064 is a wasteful number, since it uses less digits than its factorization.

1156566566064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264781754 (or 264781748 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 57.

The spelling of 1156566566064 in words is "one trillion, one hundred fifty-six billion, five hundred sixty-six million, five hundred sixty-six thousand, sixty-four".