1161320655331 has 8 divisors (see below), whose sum is σ = 1201378431600. Its totient is φ = 1121263694880.

The previous prime is 1161320655323. The next prime is 1161320655337. The reversal of 1161320655331 is 1335560231611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161320655331 - 2³ = 1161320655323 is a prime.

It is a super-2 number, since 2×1161320655331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161320655337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4652380 + ... + 4895638.

It is an arithmetic number, because the mean of its divisors is an integer number (150172303950).

Almost surely, 2^{1161320655331} is an apocalyptic number.

1161320655331 is a deficient number, since it is larger than the sum of its proper divisors (40057776269).

1161320655331 is a wasteful number, since it uses less digits than its factorization.

1161320655331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407909.

The product of its (nonzero) digits is 48600, while the sum is 37.

Adding to 1161320655331 its reverse (1335560231611), we get a palindrome (2496880886942).

The spelling of 1161320655331 in words is "one trillion, one hundred sixty-one billion, three hundred twenty million, six hundred fifty-five thousand, three hundred thirty-one".