1161617215660 has 24 divisors (see below), whose sum is σ = 2661159440016. Its totient is φ = 422406260160.

The previous prime is 1161617215631. The next prime is 1161617215663. The reversal of 1161617215660 is 665127161611.

It is not an unprimeable number, because it can be changed into a prime (1161617215663) 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 7 ways as a sum of consecutive naturals, for example, 2640038907 + ... + 2640039346.

It is an arithmetic number, because the mean of its divisors is an integer number (110881643334).

Almost surely, 2^{1161617215660} is an apocalyptic number.

1161617215660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161617215660 is an abundant number, since it is smaller than the sum of its proper divisors (1499542224356).

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

1161617215660 is a wasteful number, since it uses less digits than its factorization.

1161617215660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280078273 (or 5280078271 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 1161617215660 in words is "one trillion, one hundred sixty-one billion, six hundred seventeen million, two hundred fifteen thousand, six hundred sixty".