1161665995556 has 12 divisors (see below), whose sum is σ = 2217725991600. Its totient is φ = 528029997960.

The previous prime is 1161665995493. The next prime is 1161665995559. The reversal of 1161665995556 is 6555995661611.

It is a happy number.

It is a super-2 number, since 2×1161665995556² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1161665995492 and 1161665995501.

It is not an unprimeable number, because it can be changed into a prime (1161665995559) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13200749906 + ... + 13200749993.

It is an arithmetic number, because the mean of its divisors is an integer number (184810499300).

Almost surely, 2^{1161665995556} is an apocalyptic number.

It is an amenable number.

1161665995556 is a deficient number, since it is larger than the sum of its proper divisors (1056059996044).

1161665995556 is a wasteful number, since it uses less digits than its factorization.

1161665995556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26401499914 (or 26401499912 counting only the distinct ones).

The product of its digits is 65610000, while the sum is 65.

The spelling of 1161665995556 in words is "one trillion, one hundred sixty-one billion, six hundred sixty-five million, nine hundred ninety-five thousand, five hundred fifty-six".