1163641431 has 4 divisors (see below), whose sum is σ = 1551521912. Its totient is φ = 775760952.

The previous prime is 1163641411. The next prime is 1163641439. The reversal of 1163641431 is 1341463611.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1163641431 - 2¹⁰ = 1163640407 is a prime.

It is a super-2 number, since 2×1163641431² = 2708122759879455522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163641439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193940236 + ... + 193940241.

It is an arithmetic number, because the mean of its divisors is an integer number (387880478).

Almost surely, 2^1163641431 is an apocalyptic number.

1163641431 is a deficient number, since it is larger than the sum of its proper divisors (387880481).

1163641431 is an equidigital number, since it uses as much as digits as its factorization.

1163641431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387880480.

The product of its digits is 5184, while the sum is 30.

The square root of 1163641431 is about 34112.1888919489. The cubic root of 1163641431 is about 1051.8158845312.

The spelling of 1163641431 in words is "one billion, one hundred sixty-three million, six hundred forty-one thousand, four hundred thirty-one".