1161631755461 has 8 divisors (see below), whose sum is σ = 1230409856664. Its totient is φ = 1092903301120.

The previous prime is 1161631755421. The next prime is 1161631755467. The reversal of 1161631755461 is 1645571361611.

It can be written as a sum of positive squares in 4 ways, for example, as 856585419361 + 305046336100 = 925519^2 + 552310^2 .

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 1161631755461 - 2⁶ = 1161631755397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161631755467) 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, 12363530 + ... + 12457131.

It is an arithmetic number, because the mean of its divisors is an integer number (153801232083).

Almost surely, 2^{1161631755461} is an apocalyptic number.

It is an amenable number.

1161631755461 is a deficient number, since it is larger than the sum of its proper divisors (68778101203).

1161631755461 is a wasteful number, since it uses less digits than its factorization.

1161631755461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24823431.

The product of its digits is 453600, while the sum is 47.

The spelling of 1161631755461 in words is "one trillion, one hundred sixty-one billion, six hundred thirty-one million, seven hundred fifty-five thousand, four hundred sixty-one".