1165163621331 has 16 divisors (see below), whose sum is σ = 1558635107328. Its totient is φ = 774234225600.

The previous prime is 1165163621311. The next prime is 1165163621383. The reversal of 1165163621331 is 1331263615611.

It is not a de Polignac number, because 1165163621331 - 2⁶ = 1165163621267 is a prime.

It is a super-2 number, since 2×1165163621331² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1165163621331.

It is not an unprimeable number, because it can be changed into a prime (1165163621311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31732575 + ... + 31769271.

It is an arithmetic number, because the mean of its divisors is an integer number (97414694208).

Almost surely, 2^{1165163621331} is an apocalyptic number.

1165163621331 is a deficient number, since it is larger than the sum of its proper divisors (393471485997).

1165163621331 is a wasteful number, since it uses less digits than its factorization.

1165163621331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71042.

The product of its digits is 58320, while the sum is 39.

The spelling of 1165163621331 in words is "one trillion, one hundred sixty-five billion, one hundred sixty-three million, six hundred twenty-one thousand, three hundred thirty-one".